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

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =29a(5) =53a(6) =93a(7) =159a(8) =267a(9) =443a(10) =729a(11) =1193a(12) =1945a(13) =3163a(14) =5135a(15) =8327a(16) =13493a(17) =21853a(18) =35381a(19) =57271a(20) =92691a(21) =150003a(22) =242737a(23) =392785a(24) =635569a(25) =1028403a(26) =1664023a(27) =2692479a(28) =4356557a(29) =7049093