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) =4a(3) =9a(4) =19a(5) =36a(6) =65a(7) =113a(8) =192a(9) =321a(10) =531a(11) =872a(12) =1425a(13) =2321a(14) =3772a(15) =6121a(16) =9923a(17) =16076a(18) =26033a(19) =42145a(20) =68216a(21) =110401a(22) =178659a(23) =289104a(24) =467809a(25) =756961a(26) =1224820a(27) =1981833a(28) =3206707a(29) =5188596