G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(4/4^n); self-convolution of A110156.
A110154
G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(4/4^n); self-convolution of A110156.
Terms
- a(0) =1a(1) =4a(2) =20a(3) =84a(4) =380a(5) =1540a(6) =6796a(7) =27380a(8) =117020a(9) =476260a(10) =2002220a(11) =8063316a(12) =33957180a(13) =136489156a(14) =566211660a(15) =2290272692a(16) =9463603036a(17) =38042178340a(18) =157211980652a(19) =631321594900
External references
- oeis: A110154