Second diagonal of A027447.

Terms

a(0) =7a(1) =19a(2) =37a(3) =549a(4) =364a(5) =12700a(6) =38025a(7) =265825a(8) =212464a(9) =21019824a(10) =17507700a(11) =2502630900a(12) =2144458800a(13) =1858077936a(14) =6501984489