Seventh column of triangle A028364.

Terms

a(0) =429a(1) =1001a(2) =3003a(3) =9646a(4) =32123a(5) =109550a(6) =380162a(7) =1337220a(8) =4755402a(9) =17065365a(10) =61714147a(11) =224661206a(12) =822574599a(13) =3027096930a(14) =11190101910a(15) =41532876060a(16) =154712622870a(17) =578210935770