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Numbers k for which A003415(k) and A276086(k) are relatively prime, where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.
7

%I #7 Nov 03 2022 10:08:39

%S 0,2,3,4,5,7,10,11,12,13,16,17,18,19,22,23,24,28,29,30,31,32,34,37,40,

%T 41,42,43,47,53,54,56,58,59,60,61,66,67,70,71,72,73,78,79,80,82,83,84,

%U 89,90,96,97,101,103,104,105,107,108,109,113,114,118,120,124,127,130,131,132,136,137,138,139,140,142,144

%N Numbers k for which A003415(k) and A276086(k) are relatively prime, where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%o (PARI) isA356311(n) = A356310(n); \\ See code in A356310.

%Y Positions of 1's in A327858. Positions of 0's in A356304 (for n >= 2) and in A356305.

%Y Cf. A003415, A276086, A356310 (characteristic function), A356312 (complement).

%Y Cf. also A324583.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 03 2022