login
A330734
a(n) = n - A309639(n), where A309639(n) is the index of the least harmonic number H_i whose denominator (A002805) is divisible by n.
3
0, 0, 0, 0, 0, 3, 0, 0, 0, 5, 0, 8, 0, 7, 10, 0, 0, 9, 0, 15, 12, 11, 0, 15, 0, 13, 0, 21, 0, 25, 0, 0, 22, 17, 28, 27, 0, 19, 26, 32, 0, 33, 0, 33, 36, 23, 0, 32, 0, 25, 34, 39, 0, 27, 44, 48, 38, 29, 0, 55, 0, 31, 54, 0, 52, 55, 0, 51, 45, 63, 0, 63, 0, 37, 50, 57, 66, 65, 0, 64, 0, 41, 0, 75, 68, 43, 58, 77, 0, 81
OFFSET
1,6
LINKS
FORMULA
a(n) = n - A309639(n).
PROG
(PARI) A330734(n) = (n-A309639(n));
CROSSREFS
Cf. A000961 (indices of zeros), A309639, A330691, A330692, A330735.
Sequence in context: A245552 A195938 A184762 * A081805 A333784 A181189
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 10 2020
STATUS
approved