Constant term of the reduction of the polynomial p(n,x)=(1/2)((x+2)^n+(x-2)^n) by x^2->x+1.

A192353

Constant term of the reduction of the polynomial p(n,x)=(1/2)((x+2)^n+(x-2)^n) by x^2->x+1.

Terms

    a(0) =1a(1) =0a(2) =5a(3) =1a(4) =42a(5) =43a(6) =429a(7) =820a(8) =4861a(9) =12597a(10) =58598a(11) =177859a(12) =732825a(13) =2417416a(14) =9358677a(15) =32256553a(16) =120902914a(17) =426440955a(18) =1571649221a(19) =5610955132a(20) =20497829133a(21) =73645557469a(22) =267803779710a(23) =965384509651

External references