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A305791 Dirichlet convolution of A175851 with itself. 6
1, 2, 2, 5, 2, 6, 2, 8, 7, 10, 2, 12, 2, 6, 8, 16, 2, 14, 2, 16, 8, 10, 2, 20, 7, 10, 16, 20, 2, 22, 2, 20, 8, 10, 12, 36, 2, 6, 8, 32, 2, 18, 2, 16, 18, 10, 2, 32, 7, 22, 12, 24, 2, 30, 8, 32, 12, 14, 2, 44, 2, 6, 18, 32, 12, 30, 2, 16, 8, 30, 2, 48, 2, 6, 18, 16, 12, 30, 2, 44, 25, 10, 2, 44, 8, 10, 12, 36, 2, 54, 8, 20, 12, 14, 16, 56, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

FORMULA

a(n) = Sum_{d|n} A175851(d)*A175851(n/d).

PROG

(PARI)

A175851(n) = if(1==n, n, 1 + n - precprime(n));

A305791(n) = sumdiv(n, d, A175851(d)*A175851(n/d));

CROSSREFS

Cf. A175851.

Cf. also A305796, A305797, A305798, A305799.

Sequence in context: A093663 A011143 A240081 * A299764 A301830 A305799

Adjacent sequences:  A305788 A305789 A305790 * A305792 A305793 A305794

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 13 2018

STATUS

approved

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Last modified September 19 18:41 EDT 2018. Contains 315210 sequences. (Running on oeis4.)