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

Terms

a(0) =1a(1) =0a(2) =2a(3) =5a(4) =12a(5) =24a(6) =45a(7) =80a(8) =138a(9) =233a(10) =388a(11) =640a(12) =1049a(13) =1712a(14) =2786a(15) =4525a(16) =7340a(17) =11896a(18) =19269a(19) =31200a(20) =50506a(21) =81745a(22) =132292a(23) =214080a(24) =346417a(25) =560544a(26) =907010a(27) =1467605a(28) =2374668a(29) =3842328