p-INVERT of (1,2,2,3,3,4,4,...) (A080513), where p(S) = 1 - S - S^2.

Terms

a(0) =1a(1) =4a(2) =13a(3) =42a(4) =133a(5) =424a(6) =1348a(7) =4291a(8) =13653a(9) =43449a(10) =138261a(11) =439979a(12) =1400101a(13) =4455420a(14) =14178073a(15) =45117606a(16) =143573662a(17) =456881476a(18) =1453892534a(19) =4626590576a(20) =14722780217a(21) =46850970327a(22) =149089600359a(23) =474434334814