A374050 - OEIS

%I #8 Jun 28 2024 09:09:33

%S 3,5,11,13,19,21,23,27,31,35,37,43,45,47,51,59,61,71,73,75,77,83,85,

%T 87,89,91,99,101,103,109,113,117,123,125,131,133,137,145,147,149,151,

%U 159,161,163,165,167,171,179,181,187,189,193,195,197,201,205,207,211,217,221,223,229,233,237,241,243,245,251,259

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

%H Antti Karttunen, <a href="/A374050/b374050.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) isA374050(n) = !A374048(n);

%Y Indices of 0's in A374048, which is the characteristic function of complement, A374049.

%Y Cf. A328846.

%Y Cf. also A374047.

%K nonn

%O 1,1

%A _Antti Karttunen_, Jun 28 2024