A331731 Odd part of A331595(n), where A331595(n) = gcd(A122111(n), A241909(n)).

1, 1, 1, 3, 1, 3, 1, 5, 3, 3, 1, 5, 1, 3, 9, 7, 1, 15, 1, 5, 9, 3, 1, 7, 3, 3, 5, 5, 1, 15, 1, 11, 9, 3, 9, 7, 1, 3, 9, 7, 1, 15, 1, 5, 25, 3, 1, 11, 3, 45, 9, 5, 1, 7, 27, 7, 9, 3, 1, 7, 1, 3, 25, 13, 27, 15, 1, 5, 9, 45, 1, 11, 1, 3, 15, 5, 9, 15, 1, 11, 7, 3, 1, 7, 27, 3, 9, 7, 1, 7, 27, 5, 9, 3, 27, 13, 1, 135, 25, 7, 1, 15, 1, 7, 75

Offset

1,4

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537

Index entries for sequences computed from indices in prime factorization

Formula

a(n) = A000265(A331595(n)).

Prog

(PARI) A331731(n) = A000265(A331595(n));

Crossrefs

Cf. A122111, A241909, A331595, A331600.

Cf. also A322865, A331732.

Sequence in context: A103790 A249947 A193583 * A309891 A317937 A322436

Adjacent sequences: A331728 A331729 A331730 * A331732 A331733 A331734

Keyword

nonn

Author

Antti Karttunen, Jan 25 2020

Status

approved