A374038 - OEIS

A374038

Numbers k such that A328845(k) and A328846(k) are not both even, where A328845 and A328846 are the first and second Fibonacci-based variants of the arithmetic derivative.

%I #7 Jun 28 2024 14:00:25

%S 2,3,5,6,7,10,11,13,14,15,17,18,19,21,22,23,26,27,29,30,31,33,34,35,

%T 37,38,39,41,42,43,45,46,47,50,51,53,54,57,58,59,61,62,63,66,67,69,70,

%U 71,73,74,75,77,78,79,82,83,85,86,87,89,90,91,93,94,97,98,99,101,102,103,106,107,109,110,111,113,114,117

%N Numbers k such that A328845(k) and A328846(k) are not both even, where A328845 and A328846 are the first and second Fibonacci-based variants of the arithmetic derivative.

%H Antti Karttunen, <a href="/A374038/b374038.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) isA374038(n) = !A374036(n);

%Y Union of A374047 and A374050.

%Y Cf. A328845, A328846, A374036, A374037 (complement).

%K nonn

%O 1,1

%A _Antti Karttunen_, Jun 28 2024