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A373255
Numbers k for which A003415(k) == +1 (mod 3), where A003415 is the arithmetic derivative.
5
2, 3, 4, 5, 7, 10, 11, 12, 13, 17, 19, 21, 22, 23, 25, 29, 30, 31, 34, 37, 39, 41, 43, 46, 47, 48, 53, 55, 57, 58, 59, 61, 66, 67, 71, 73, 75, 79, 82, 83, 84, 85, 89, 93, 94, 97, 101, 102, 103, 106, 107, 109, 111, 113, 115, 118, 120, 121, 127, 128, 129, 131, 137, 138, 139, 142, 145, 147, 149, 151, 156, 157, 163
OFFSET
1,1
LINKS
PROG
(PARI) isA373255 = A373254;
CROSSREFS
Positions of +1's in A373253.
Cf. A000040 (subsequence), A003415, A373254 (characteristic function).
Sequence in context: A047502 A356311 A117092 * A285276 A002504 A133431
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 31 2024
STATUS
approved