Triangle read by rows, T(n,k) = denominator(binomial(-1/2, n-k))*binomial(n-1/2, k-1/2), for n>=0 and 0<=k<=n.

A269949

Triangle read by rows, T(n,k) = denominator(binomial(-1/2, n-k))*binomial(n-1/2, k-1/2), for n>=0 and 0<=k<=n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =5a(7) =15a(8) =5a(9) =1a(10) =35a(11) =35a(12) =35a(13) =7a(14) =1a(15) =63a(16) =315a(17) =105a(18) =63a(19) =9a(20) =1a(21) =231a(22) =693a(23) =1155a(24) =231a(25) =99a(26) =11a(27) =1a(28) =429a(29) =3003

External references