A346939 a(n) = Sum_{d|n} mu(n/d) * binomial(8*d,d) / (7*d+1).

1, 7, 91, 1232, 18277, 285285, 4638347, 77650784, 1329890613, 23190011435, 410333440535, 7349042707872, 132969010888279, 2426870701777445, 44627576949345735, 826044435331747776, 15378186970730687399, 287756293702214647875, 5409093674555090316299, 102094541350713952736608

Offset

1,2

Comments

Moebius transform of A007556.

Links

Table of n, a(n) for n=1..20.

Mathematica

Table[Sum[MoebiusMu[n/d] Binomial[8 d, d]/(7 d + 1), {d, Divisors[n]}], {n, 20}]

Crossrefs

Cf. A002996, A007556, A008683, A346925, A346935, A346936, A346937, A346938.

Sequence in context: A249640 A248226 A165230 * A156712 A004368 A243946

Adjacent sequences: A346936 A346937 A346938 * A346940 A346941 A346942

Keyword

nonn

Author

Ilya Gutkovskiy, Aug 08 2021

Status

approved