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

Terms

a(0) =1a(1) =1a(2) =8a(3) =19a(4) =41a(5) =78a(6) =141a(7) =245a(8) =416a(9) =695a(10) =1149a(11) =1886a(12) =3081a(13) =5017a(14) =8152a(15) =13227a(16) =21441a(17) =34734a(18) =56245a(19) =91053a(20) =147376a(21) =238511a(22) =385973a(23) =624574a(24) =1010641a(25) =1635313a(26) =2646056a(27) =4281475a(28) =6927641a(29) =11209230