Constant term of the reduction of the n-th 2nd-kind Chebyshev polynomial by x^2 -> x+1.

Terms

a(0) =0a(1) =3a(2) =8a(3) =21a(4) =64a(5) =183a(6) =528a(7) =1529a(8) =4416a(9) =12763a(10) =36888a(11) =106605a(12) =308096a(13) =890415a(14) =2573344a(15) =7437105a(16) =21493632a(17) =62117747a(18) =179523624a(19) =518832901a(20) =1499454912a(21) =4333505127a(22) =12524062256a(23) =36195211689a(24) =104606103232a(25) =302317249227a(26) =873713066040