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A373376
Numbers k such that gcd(A001414(k), A003415(k)) is odd, where A001414 is the sum of prime factors with repetition, and A003415 is the arithmetic derivative.
4
2, 3, 5, 6, 7, 10, 11, 12, 13, 14, 17, 18, 19, 20, 22, 23, 24, 26, 27, 28, 29, 30, 31, 34, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 52, 53, 54, 56, 58, 59, 61, 62, 63, 66, 67, 68, 70, 71, 73, 74, 75, 76, 78, 79, 80, 82, 83, 86, 88, 89, 90, 92, 94, 96, 97, 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109
OFFSET
1,1
COMMENTS
Numbers k such that sopfr(k) and k' are not both even.
LINKS
PROG
(PARI) isA373376(n) = !A373374(n);
CROSSREFS
Positions of odd terms in A373364, positions of 0's in A373374.
Complement of A373375.
Sequence in context: A166111 A004762 A061854 * A367861 A214432 A110086
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 03 2024
STATUS
approved