cp's OEIS Frontend

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.

%I A374120 #6 Jun 29 2024 13:30:53
%S A374120 1,6,8,27,35,36,48,64,77,85,91,115,125,133,155,162,187,203,205,210,
%T A374120 216,221,235,253,259,275,280,288,299,301,323,325,341,343,355,365,371,
%U A374120 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
%N 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.
%C A374120 A multiplicative semigroup: if m and n are in the sequence, then so is m*n.
%H A374120 Antti Karttunen, <a href="/A374120/b374120.txt">Table of n, a(n) for n = 1..12000</a>
%o A374120 (PARI) isA374120 = A374119;
%Y A374120 Intersection of A374052 and A339746.
%Y A374120 Indices of multiples of 3 in A374112.
%Y A374120 Cf. A113177, A276085, A374119 (characteristic function).
%Y A374120 Cf. also A374114.
%K A374120 nonn
%O A374120 1,2
%A A374120 _Antti Karttunen_, Jun 29 2024