Third column (m=3) of triangle A144351.

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =36a(5) =166a(6) =968a(7) =6372a(8) =49368a(9) =429240a(10) =4198176a(11) =45268416a(12) =535590144a(13) =6879038400a(14) =95412176640