Row 3 of table A128325.

Terms

a(0) =1a(1) =1a(2) =5a(3) =30a(4) =200a(5) =1435a(6) =10900a(7) =86799a(8) =720074a(9) =6196295a(10) =55135043a(11) =506125404a(12) =4784680169a(13) =46516469860a(14) =464550190798