A289061 - OEIS

%I #15 Jun 03 2018 09:44:17

%S 984,286752,102360024,41113157376,17612599690200,7859501322760224,

%T 3607454891819189208,1690291743695465539584,804566332578533745648600,

%U 387754701670974543569133600,188763097395728376240220054488

%N a(n) = 2 * (A288851(n) - 12).

%H Seiichi Manyama, <a href="/A289061/b289061.txt">Table of n, a(n) for n = 1..367</a>

%F a(n) = (1/n) * Sum_{d|n} A008683(n/d) * A288840(d).

%F a(n) ~ 2*exp(2*Pi*n) / n. - _Vaclav Kotesovec_, Jun 03 2018

%Y Related to E_{k+2}/E_k: A288995 (k=2), A192731 (k=4), this sequence (k=6).

%Y Cf. A008683, A288840 (E_8*E_6), A288851.

%Y Cf. A289063.

%K nonn

%O 1,1

%A _Seiichi Manyama_, Jun 23 2017