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A349837
a(n) is the number of integers m > 1 such that sigma(m) = tau(m)^n, with a(1) = 1.
2
1, 1, 1, 2, 3, 3, 3, 5, 4, 5, 5, 7, 9, 5, 6, 2, 7, 7, 5, 6, 5, 9, 6, 11, 6, 12, 10, 12, 14, 11, 13, 21, 16, 20, 19, 20, 19, 21, 21, 19, 17, 21, 18, 22, 19, 22, 20, 17, 17, 15, 23, 14, 17, 12, 16, 9, 11, 12, 10, 9, 9, 7, 10, 3, 8, 7, 6, 3, 7, 4, 4, 4, 3, 3, 2
OFFSET
1,4
COMMENTS
a(n) is the number of integers m such that A334455(m) = n.
Conjecture: a(n) > 0 except for n = 76 and n = 81.
LINKS
PROG
(PARI) See Links section.
CROSSREFS
Cf. A000005 (tau), A000203 (sigma), A334455, A349006, A349007, A349838.
Sequence in context: A205778 A328972 A081831 * A111912 A096288 A339310
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Dec 01 2021
STATUS
approved