A374120 Numbers k such that A113177(k) and A276085(k) are both multiples of 3, where A113177 and A276085 are fully additive with a(p) = Fibonacci(p) and a(p) = p#/p, respectively.

1, 6, 8, 27, 35, 36, 48, 64, 77, 85, 91, 115, 125, 133, 155, 162, 187, 203, 205, 210, 216, 221, 235, 253, 259, 275, 280, 288, 299, 301, 323, 325, 341, 343, 355, 365, 371, 384, 395, 403, 413, 427, 437, 445, 451, 462, 469, 475, 485, 493, 510, 512, 515, 517, 533, 546, 565, 581, 589, 605, 611, 616, 629, 635, 667, 680

Offset: 1

Author

Antti Karttunen, Jun 29 2024

Keywords

• nonn

Comments

A multiplicative semigroup: if m and n are in the sequence, then so is m*n.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..12000

Crossrefs

Intersection of A374052 and A339746.

Indices of multiples of 3 in A374112.

Cf. A113177, A276085, A374119 (characteristic function).

Cf. also A374114.

Programs

PARI

isA374120 = A374119;