A035035 Numbers k such that k > d(k)^2, where d(k) is the number of divisors of k.

5, 7, 11, 13, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 81, 82

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = n + 54 for n >= 1207. - Amiram Eldar, Aug 29 2020

Mathematica

Select[Range[100], DivisorSigma[0, #]^2 < # &] (* Amiram Eldar, Aug 29 2020 *)

Crossrefs

Complement of A035033.

Cf. A000005, A034884, A035034.

Sequence in context: A175100 A270998 A342105 * A256387 A113909 A111906

Adjacent sequences: A035032 A035033 A035034 * A035036 A035037 A035038

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved