242787domain: NAppears in sequencesa(n) = a(n-1) + a(n-2) - 1.at n=26A001588a(n+2) = a(n+1) + a(n) + (-1)^n, with a(1) = a(2) = 1.at n=27A066983a(n) = 2*(A000045(n)-(n mod 2)) + 1 + (n mod 2).at n=26A166012Constant term in the reduction by (x^2 -> x + 1) of the polynomial p(n,x) defined below at Comments.at n=14A192908