Third diagonal of A027538.

Terms

a(0) =163a(1) =4719a(2) =64966a(3) =610166a(4) =4546137a(5) =29120349a(6) =168301828a(7) =905468700a(8) =4631682463a(9) =22861603067a(10) =110036539458a(11) =520325868354