Triangle read by rows. T(n, k) = (n - k + 1) * binomial(n + k + 1, 2*k)^2 / (n + k + 1).

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =18a(5) =5a(6) =1a(7) =60a(8) =75a(9) =7a(10) =1a(11) =150a(12) =525a(13) =196a(14) =9a(15) =1a(16) =315a(17) =2450a(18) =2352a(19) =405a(20) =11a(21) =1a(22) =588a(23) =8820a(24) =17640a(25) =7425a(26) =726a(27) =13a(28) =1a(29) =1008