A278420 - OEIS

%I #7 Sep 08 2017 07:24:15

%S 1,1,1,2,2,5,4,9,10,20,18,32,45,58,82,101,148,178,274,306,452,512,785,

%T 872,1258,1450,2061,2304,3274,3796,5108,6056,7954,9376,12200,14733,

%U 18500,22608,28004,34354,41905,51752,62122,77090,91764,114640,134560,167690

%N a(n) = (A278399(n)^2 + A278400(n)^2)/2.

%H Vaclav Kotesovec, <a href="/A278420/b278420.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) = A292042(n)^2 + A292043(n)^2. - _Vaclav Kotesovec_, Sep 08 2017

%t Abs[(QPochhammer[I, x] + O[x]^60)[[3]]]^2 / 2

%Y Cf. A278399, A278400, A292042, A292043.

%K nonn

%O 0,4

%A _Vladimir Reshetnikov_, Nov 21 2016