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A305796 Dirichlet convolution of A246277 with itself. 3
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 (list; graph; refs; listen; history; text; internal format)
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: A154794 A177264 A300252 * A020781 A007432 A079124

Adjacent sequences:  A305793 A305794 A305795 * A305797 A305798 A305799

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 13 2018

STATUS

approved

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Last modified July 22 10:28 EDT 2018. Contains 312891 sequences. (Running on oeis4.)