a(n) = sum of the squares of the coefficients of x^(2k) in A(x^2)^{2*(n-2k)+1}, as k varies from 0 to floor(n/2), with a(0)=1.

A162249

a(n) = sum of the squares of the coefficients of x^(2k) in A(x^2)^{2*(n-2k)+1}, as k varies from 0 to floor(n/2), with a(0)=1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =10a(4) =30a(5) =131a(6) =582a(7) =3196a(8) =13986a(9) =70100a(10) =336416a(11) =1723518a(12) =8487202a(13) =44468780a(14) =228236112a(15) =1241788448a(16) =6421700878a(17) =34682391148a(18) =182473774272a(19) =993091141104

External references