A373473 Numbers k such that A001414(k) and A059975(k) are both multiples of 3, where A001414 and A059975 are fully additive with a(p) = p and a(p) = p-1, respectively.

1, 8, 20, 27, 42, 44, 50, 64, 68, 78, 92, 105, 110, 114, 116, 125, 160, 164, 170, 186, 188, 195, 212, 216, 222, 230, 231, 236, 242, 258, 275, 284, 285, 290, 332, 336, 343, 352, 356, 357, 366, 374, 400, 402, 404, 410, 425, 428, 429, 438, 452, 465, 470, 474, 483, 506, 512, 524, 530, 540, 544, 548, 555, 575, 578, 582

Offset: 1

Author

Antti Karttunen, Jun 06 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..10000

Crossrefs

Intersection of A289142 and A373385.

Positions of multiples of 3 in A373369.

Cf. A001414, A059975.

Programs

PARI

isA373473 = A373472;