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

A192355

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

Terms

    a(0) =1a(1) =0a(2) =6a(3) =2a(4) =70a(5) =90a(6) =926a(7) =2002a(8) =13110a(9) =37130a(10) =194446a(11) =640002a(12) =2973350a(13) =10653370a(14) =46333566a(15) =174174002a(16) =730176790a(17) =2820264810a(18) =11582386286a(19) =45425564002a(20) =184414199430a(21) =729520967450

External references