A336692 Binary weight of 1+sigma(n).

1, 1, 2, 1, 3, 3, 2, 1, 3, 3, 3, 4, 4, 3, 3, 1, 3, 2, 3, 4, 2, 3, 3, 5, 1, 4, 3, 4, 5, 3, 2, 1, 3, 5, 3, 4, 4, 5, 4, 5, 4, 3, 4, 4, 5, 3, 3, 6, 4, 5, 3, 4, 5, 5, 3, 5, 3, 5, 5, 4, 6, 3, 4, 1, 4, 3, 3, 7, 3, 3, 3, 3, 4, 5, 6, 4, 3, 4, 3, 6, 5, 7, 4, 4, 5, 3, 5, 5, 5, 6, 4, 4, 2, 3, 5, 7, 4, 4, 5, 5, 5, 5, 4, 5, 3

Offset

1,3

Links

Antti Karttunen, Table of n, a(n) for n = 1..65537

Index entries for sequences related to binary expansion of n

Index entries for sequences related to sigma(n)

Formula

a(n) = A000120(1+A000203(n)) = A000120(A088580(n)) = A000120(A332459(n)).

Prog

(PARI) A336692(n) = hammingweight(1+sigma(n));

Crossrefs

Cf. A000120, A000203, A088580, A175548, A324294, A332459, A336691, A336693, A336694, A336695, A336696.

Sequence in context: A308530 A302555 A355255 * A332434 A262209 A324338

Adjacent sequences: A336689 A336690 A336691 * A336693 A336694 A336695

Keyword

nonn

Author

Antti Karttunen, Jul 31 2020

Status

approved