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%I #12 Aug 28 2019 11:15:35
%S 1,2,7,32,137,592,2597,11442,50567,224112,995392,4428372,19727877,
%T 87983202,392755207,1754625632,7844003907,35086658052,157023432677,
%U 703037135122,3148915010832,14108913792342,63235380631747,283495965998772,1271282293531077,5702105357347602
%N Self-convolution of A270913.
%H Vaclav Kotesovec, <a href="/A327214/b327214.txt">Table of n, a(n) for n = 0..1000</a>
%F a(n) ~ c^2 * Pi * d^n, where d = A270914 = 4.5024767476173544877385939327... and c = A327280 = 0.260542233142438469433860832160... (see A270913).
%t A270913[n_]:=SeriesCoefficient[Product[(1+x^k)^n, {k, 1, n}], {x, 0, n}];
%t Table[Sum[A270913[k]*A270913[n-k], {k, 0, n}], {n, 0, 25}]
%Y Cf. A022567, A270913, A304443, A309986, A327215.
%K nonn
%O 0,2
%A _Vaclav Kotesovec_, Aug 26 2019
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