a(n) = [x^(2^n+n-1)] (x + x^2 + x^4 + x^8 + ... + x^(2^n))^n / n for n>=1.

A135069

a(n) = [x^(2^n+n-1)] (x + x^2 + x^4 + x^8 + ... + x^(2^n))^n / n for n>=1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =18a(5) =106a(6) =816a(7) =4292a(8) =59698a(9) =594178a(10) =9066286a(11) =87498566a(12) =1784642080a(13) =20988667064a(14) =380829128200

External references