Triangle read by rows, T(n, k) = A000670(n) * binomial(n, k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =3a(6) =13a(7) =39a(8) =39a(9) =13a(10) =75a(11) =300a(12) =450a(13) =300a(14) =75a(15) =541a(16) =2705a(17) =5410a(18) =5410a(19) =2705a(20) =541a(21) =4683a(22) =28098a(23) =70245a(24) =93660a(25) =70245a(26) =28098a(27) =4683a(28) =47293a(29) =331051