A299205 Numbers k such that k-1 divides tau(k), where tau(k)=A000594(k) is Ramanujan's tau function.

2, 3, 10, 14, 15, 56, 57, 59, 70, 85, 105, 107, 116, 136, 209, 267, 295, 323, 352, 393, 415, 442, 530, 551, 645, 646, 760, 855, 1197, 1288, 1342, 1415, 1472, 1496, 1625, 1765, 1953, 2002, 2255, 2485, 2847, 2945, 3039, 3382, 3591, 3745, 3905, 4233, 4264, 4313

Offset

1,1

Comments

Numbers k such that A299204(k) = 0.

Links

Seiichi Manyama, Table of n, a(n) for n = 1..500

Eric Weisstein's World of Mathematics, Tau Function

Prog

(PARI) isok(n) = (ramanujantau(n) % (n-1)) == 0; \\ Michel Marcus, Feb 05 2018

Crossrefs

For the sequence when n is prime see A299172.

Cf. A000594, A063938, A299157, A299204.

Sequence in context: A267008 A129315 A171126 * A268878 A194544 A348475

Adjacent sequences: A299202 A299203 A299204 * A299206 A299207 A299208

Keyword

nonn

Author

Seiichi Manyama, Feb 05 2018

Status

approved