p-INVERT of the odd positive integers, where p(S) = 1 + S - 3 S^2.

Terms

a(0) =-1a(1) =1a(2) =12a(3) =25a(4) =61a(5) =266a(6) =963a(7) =3053a(8) =10220a(9) =35413a(10) =120345a(11) =405682a(12) =1376119a(13) =4676201a(14) =15859212a(15) =53768225a(16) =182400581a(17) =618792826a(18) =2098887003a(19) =7119249973a(20) =24149097580a(21) =81915342653a(22) =277858469505a(23) =942504046562