Column 0 of triangle A132623.

Terms

a(0) =1a(1) =1a(2) =3a(3) =14a(4) =87a(5) =669a(6) =6098a(7) =64050a(8) =759817a(9) =10028799a(10) =145575337a(11) =2302441248a(12) =39377544316a(13) =723627151168