A305796 Dirichlet convolution of A246277 with itself.

0, 0, 0, 1, 0, 2, 0, 4, 1, 2, 0, 10, 0, 2, 2, 12, 0, 10, 0, 14, 2, 2, 0, 32, 1, 2, 4, 18, 0, 22, 0, 32, 2, 2, 2, 47, 0, 2, 2, 48, 0, 30, 0, 26, 10, 2, 0, 88, 1, 14, 2, 30, 0, 38, 2, 64, 2, 2, 0, 104, 0, 2, 14, 80, 2, 42, 0, 38, 2, 30, 0, 148, 0, 2, 10, 42, 2, 54, 0, 136, 12, 2, 0, 144, 2, 2, 2, 96, 0, 98, 2, 50, 2, 2, 2, 224, 0, 18, 18, 103, 0, 66, 0, 112, 22

Offset

1,6

Links

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

Formula

a(n) = Sum_{d|n} A246277(d)*A246277(n/d).

Prog

(PARI)
A064989(n) = {my(f); f = factor(n); if((n>1 && f[1, 1]==2), f[1, 2] = 0); for (i=1, #f~, f[i, 1] = precprime(f[i, 1]-1)); factorback(f)};
A246277(n) = { if(1==n, 0, while((n%2), n = A064989(n)); (n/2)); };
A305796(n) = sumdiv(n, d, A246277(d)*A246277(n/d));

Crossrefs

Cf. A246277, A305791, A305798.

Sequence in context: A326758 A318366 A300252 * A347961 A020781 A327883

Adjacent sequences: A305793 A305794 A305795 * A305797 A305798 A305799

Keyword

nonn

Author

Antti Karttunen, Jun 13 2018

Status

approved