Constant term in the reduction of the polynomial (x+2)^n by x^3->x^2+x+1. See Comments.

A192801

Constant term in the reduction of the polynomial (x+2)^n by x^3->x^2+x+1. See Comments.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =9a(4) =25a(5) =84a(6) =312a(7) =1199a(8) =4637a(9) =17906a(10) =68976a(11) =265249a(12) =1019069a(13) =3913484a(14) =15026092a(15) =57690143a(16) =221487945a(17) =850350482a(18) =3264725772a(19) =12534190569a(20) =48122302705a(21) =184755243892a(22) =709328262928

External references