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A104745
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a(n) = 5^n + n.
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13
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1, 6, 27, 128, 629, 3130, 15631, 78132, 390633, 1953134, 9765635, 48828136, 244140637, 1220703138, 6103515639, 30517578140, 152587890641, 762939453142, 3814697265643, 19073486328144, 95367431640645, 476837158203146
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OFFSET
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0,2
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COMMENTS
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Numbers m=5^n+n such that equation x=5^(m-x) has solution x=5^n, see A104744.
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LINKS
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FORMULA
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MAPLE
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g:=1/(1-5*z): gser:=series(g, z=0, 43): seq(coeff(gser, z, n)+n, n=0..31); # Zerinvary Lajos, Jan 09 2009
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MATHEMATICA
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CoefficientList[Series[(1 - x - 4 x^2) / ((1 - 5 x) (1 - x)^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jun 16 2013 *)
LinearRecurrence[{7, -11, 5}, {1, 6, 27}, 30] (* Harvey P. Dale, Dec 03 2017 *)
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PROG
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(Magma) I:=[1, 6, 27]; [n le 3 select I[n] else 7*Self(n-1)-11*Self(n-2) +5*Self(n-3): n in [1..30]]; // Vincenzo Librandi, Jun 16 2013
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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More terms from Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 09 2007
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STATUS
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approved
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