Triangle read by rows: coefficients of polynomials P_n(x) arising from RNA combinatorics.

Terms

a(0) =1a(1) =1a(2) =1a(3) =158a(4) =558a(5) =135a(6) =2339a(7) =18378a(8) =13689a(9) =1575a(10) =1354a(11) =18908a(12) =28764a(13) =9660a(14) =675a(15) =617926a(16) =13447818a(17) =34604118a(18) =23001156a(19) =4534875a(20) =218295a(21) =525206428a(22) =16383145284a(23) =63886133214a(24) =70424606988a(25) =26926791930a(26) =3567422250a(27) =127702575a(28) =50531787a(29) =2134308548