G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(2/4^n); self-convolution equals A110154.

A110156

G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(2/4^n); self-convolution equals A110154.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =26a(4) =106a(5) =350a(6) =1512a(7) =5110a(8) =21476a(9) =77886a(10) =319148a(11) =1141038a(12) =4910266a(13) =17499058a(14) =72541048a(15) =272237050a(16) =1121013506a(17) =4112829790a(18) =17377874692a(19) =63697436318a(20) =265450712278

External references