Triangle T(n,k) = binomial(n,k) + A176490(n,k) - 1 read along rows 0<=k<=n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =10a(5) =1a(6) =1a(7) =35a(8) =35a(9) =1a(10) =1a(11) =104a(12) =300a(13) =104a(14) =1a(15) =1a(16) =297a(17) =1992a(18) =1992a(19) =297a(20) =1a(21) =1a(22) =846a(23) =11747a(24) =25982a(25) =11747a(26) =846a(27) =1a(28) =1a(29) =2431