1983
- ^ The composite numbers: numbers n of the form x*y for x > 1 and y > 1. Table of n, a(n) for n = 1..17737
- ^ d(n) a(n) = sigma(n), the sum of the divisors of n. Also called sigma_1(n). Table of n, a(n) for n = 1..100000
- ^ Semiprimes (or biprimes): products of two primes. Table of n, prime(n) for n = 1..10000
- ^ Squarefree numbers: numbers that are not divisible by a square greater than 1. Table of n, prime(n) for n = 1..60794
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