Triangle read by rows: T(n,k) = (2 * (binomial(n,k)) * (n + 2 * k + 3)!)/((k + 1)! * (k + 2)! * (n + 3)!).

A087727

Triangle read by rows: T(n,k) = (2 * (binomial(n,k)) * (n + 2 * k + 3)!)/((k + 1)! * (k + 2)! * (n + 3)!).

Terms

    a(0) =1a(1) =1a(2) =5a(3) =1a(4) =14a(5) =42a(6) =1a(7) =28a(8) =210a(9) =462a(10) =1a(11) =48a(12) =660a(13) =3432a(14) =6006a(15) =1a(16) =75a(17) =1650a(18) =15015a(19) =60060a(20) =87516a(21) =1a(22) =110a(23) =3575a(24) =50050a(25) =340340a(26) =1108536a(27) =1385670a(28) =1a(29) =154

External references