A332819 a(n) = A108548(A064989(A332808(n))).

1, 1, 2, 1, 3, 2, 5, 1, 4, 3, 13, 2, 7, 5, 6, 1, 11, 4, 17, 3, 10, 13, 29, 2, 9, 7, 8, 5, 19, 6, 37, 1, 26, 11, 15, 4, 23, 17, 14, 3, 31, 10, 41, 13, 12, 29, 53, 2, 25, 9, 22, 7, 43, 8, 39, 5, 34, 19, 61, 6, 47, 37, 20, 1, 21, 26, 73, 11, 58, 15, 89, 4, 59, 23, 18, 17, 65, 14, 97, 3, 16, 31, 101, 10, 33, 41, 38, 13, 67, 12, 35, 29

Offset

1,3

Links

Antti Karttunen, Table of n, a(n) for n = 1..26927

Formula

Fully multiplicative with a(2) = 1, a(3) = 2, a(A002144(n)) = A002145(n), and a(A002145(1+n)) = A002144(n) for all n >= 1.

a(n) = A108548(A064989(A332808(n))).

a(A332818(n)) = n.

Prog

(PARI) A332819(n) = A108548(A064989(A332808(n)));

Crossrefs

A left inverse of A332818.

Cf. A002144, A002145, A064989, A108548, A332808.

Sequence in context: A290099 A250479 A299200 * A321272 A321270 A030067

Adjacent sequences: A332816 A332817 A332818 * A332820 A332821 A332822

Keyword

nonn,mult

Author

Antti Karttunen, Feb 27 2020

Status

approved