Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x) defined below in Comments.

A192377

Coefficient of x in the reduction by x^2->x+2 of the polynomial p(n,x) defined below in Comments.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =20a(4) =68a(5) =262a(6) =968a(7) =3624a(8) =13512a(9) =50442a(10) =188236a(11) =702524a(12) =2621836a(13) =9784846a(14) =36517520a(15) =136285264a(16) =508623504a(17) =1898208786a(18) =7084211604a(19) =26438637668a(20) =98670339028a(21) =368242718486

External references