G.f. satisfies: A(x) = theta_3(x*A(x)) where Jacobi theta_3(x) = 1 + 2*Sum_{n>=1} x^(n^2).
A166952
G.f. satisfies: A(x) = theta_3(x*A(x)) where Jacobi theta_3(x) = 1 + 2*Sum_{n>=1} x^(n^2).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =52a(6) =184a(7) =688a(8) =2512a(9) =8866a(10) =30824a(11) =108088a(12) =387952a(13) =1426804a(14) =5335152a(15) =20105808a(16) =75979458a(17) =287627524a(18) =1092023532a(19) =4163964648a(20) =15955084784a(21) =61412039424a(22) =237256107576a(23) =919294150288
External references
- oeis: A166952