Row 3 of table A111528.

Terms

a(0) =1a(1) =1a(2) =5a(3) =33a(4) =261a(5) =2361a(6) =23805a(7) =263313a(8) =3161781a(9) =40907241a(10) =567074925a(11) =8385483393a(12) =131787520101