p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - S - S^2 - S^3 + S^4.

Terms

a(0) =1a(1) =3a(2) =9a(3) =25a(4) =68a(5) =185a(6) =504a(7) =1373a(8) =3739a(9) =10180a(10) =27714a(11) =75445a(12) =205376a(13) =559064a(14) =1521840a(15) =4142609a(16) =11276581a(17) =30695881a(18) =83556891a(19) =227449066a(20) =619135745a(21) =1685339900a(22) =4587637263a(23) =12487934387a(24) =33993205996a(25) =92532358762a(26) =251880840375a(27) =685640764594