a(n) = sum of the squares of the coefficients of x^n in x^(n-2*k)/A(x^2)^(n-2*k+1), as k varies from 0 to floor(n/2), with a(0)=1, where A(x) is the g.f. of this sequence.

A132455

a(n) = sum of the squares of the coefficients of x^n in x^(n-2*k)/A(x^2)^(n-2*k+1), as k varies from 0 to floor(n/2), with a(0)=1, where A(x) is the g.f. of this sequence.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =11a(5) =18a(6) =30a(7) =45a(8) =80a(9) =147a(10) =330a(11) =882a(12) =1935a(13) =3298a(14) =4676a(15) =7613a(16) =18409a(17) =53724a(18) =141094a(19) =293407a(20) =473604a(21) =639418a(22) =1138534a(23) =3086050a(24) =9159520a(25) =23937239a(26) =54502764a(27) =106105954a(28) =167076383a(29) =237933308

External references