A336698 a(n) = A000265(1+A000265(sigma(n))), where A000265(k) gives the odd part of k.

1, 1, 1, 1, 1, 1, 1, 1, 7, 5, 1, 1, 1, 1, 1, 1, 5, 5, 3, 11, 1, 5, 1, 1, 1, 11, 3, 1, 1, 5, 1, 1, 1, 7, 1, 23, 5, 1, 1, 23, 11, 1, 3, 11, 5, 5, 1, 1, 29, 47, 5, 25, 7, 1, 5, 1, 3, 23, 1, 11, 1, 1, 7, 1, 11, 5, 9, 1, 1, 5, 5, 49, 19, 29, 1, 9, 1, 11, 3, 47, 61, 1, 11, 1, 7, 17, 1, 23, 23, 59, 1, 11, 1, 5, 1, 1, 25

Offset

1,9

Links

Antti Karttunen, Table of n, a(n) for n = 1..16384

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

Index entries for sequences related to sigma(n)

Formula

a(n) = A000265(1+A000265(A000203(n))) = A000265(1+A161942(n)).

a(A000265(n)) = A336699(n).

Prog

(PARI)
A000265(n) = (n>>valuation(n, 2));
A336698(n) = A000265(1+A000265(sigma(n)));

Crossrefs

Cf. A000203, A000265, A161942, A336699, A336701.

Sequence in context: A021855 A350544 A256846 * A241837 A145176 A093205

Adjacent sequences: A336695 A336696 A336697 * A336699 A336700 A336701

Keyword

nonn

Author

Antti Karttunen, Aug 02 2020

Status

approved