A374049 - OEIS

%I #9 Jun 28 2024 09:09:28

%S 0,1,2,4,6,7,8,9,10,12,14,15,16,17,18,20,22,24,25,26,28,29,30,32,33,

%T 34,36,38,39,40,41,42,44,46,48,49,50,52,53,54,55,56,57,58,60,62,63,64,

%U 65,66,67,68,69,70,72,74,76,78,79,80,81,82,84,86,88,90,92,93,94,95,96,97,98,100,102,104,105,106,107,108

%N Numbers k for which A328846(k) is even, where A328846 is the second Fibonacci based variant of arithmetic derivative.

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

%H Antti Karttunen, <a href="/A374049/b374049.txt">Table of n, a(n) for n = 1..12000</a>

%H <a href="/index/Pri#prime_indices">Index entries for sequences related to prime indices in the factorization of n</a>

%o (PARI) isA374049 = A374048;

%Y Cf. A328846, A374048 (characteristic function), A374050 (complement).

%Y Cf. also A374046.

%K nonn

%O 1,3

%A _Antti Karttunen_, Jun 28 2024