Triangle read by rows: T(k,s)=(2k-1)(2k+1)binomial(2k-s-1,2k-2s-1)/(2k-2s+1); k>=1, 0<=s<=k-1.

Terms

a(0) =1a(1) =3a(2) =10a(3) =5a(4) =28a(5) =35a(6) =7a(7) =54a(8) =126a(9) =84a(10) =9a(11) =88a(12) =297a(13) =396a(14) =165a(15) =11a(16) =130a(17) =572a(18) =1144a(19) =1001a(20) =286a(21) =13a(22) =180a(23) =975a(24) =2600a(25) =3510a(26) =2184a(27) =455a(28) =15a(29) =238