Triangle T(n, k) = A154646(n,k) - A154646(n,0) + 1, 0 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =22a(5) =1a(6) =1a(7) =145a(8) =145a(9) =1a(10) =1a(11) =780a(12) =2246a(13) =780a(14) =1a(15) =1a(16) =3919a(17) =25144a(18) =25144a(19) =3919a(20) =1a(21) =1a(22) =19202a(23) =243047a(24) =524812a(25) =243047a(26) =19202a(27) =1a(28) =1a(29) =93349