A318655 The 2-adic valuation of A318649, the numerators of "Dirichlet Square Root" of squares.

0, 1, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0

Offset

1,8

Comments

Probably also the 2-adic valuation of A318511.

Links

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

Formula

a(n) = A007814(A318649(n)).

It seems that for all n >= 1, a(n) <= A007814(A064549(n)) <= A007814(A000290(n)).

Prog

(PARI) A318655(n) = valuation(A318649(n), 2); \\ Needs also code from A318649.

Crossrefs

Cf. A318511, A318649, A318651, A318652, A318654 (the positions of nonzero terms).

Sequence in context: A347245 A104488 A244413 * A056626 A366123 A290081

Adjacent sequences: A318652 A318653 A318654 * A318656 A318657 A318658

Keyword

nonn

Author

Antti Karttunen, Sep 01 2018

Status

approved