p-INVERT of A014217 (starting at n=1), where p(S) = 1 - S - S^2.

Terms

a(0) =1a(1) =4a(2) =15a(3) =53a(4) =187a(5) =656a(6) =2301a(7) =8071a(8) =28308a(9) =99293a(10) =348275a(11) =1221603a(12) =4284864a(13) =15029495a(14) =52717114a(15) =184909361a(16) =648583888a(17) =2274958177a(18) =7979591823a(19) =27989035739a(20) =98173708464a(21) =344351878525