Triangle T(n,m) = 2*A022167(n,m) - binomial(n, m), 0 <= m <= n, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =23a(8) =23a(9) =1a(10) =1a(11) =76a(12) =254a(13) =76a(14) =1a(15) =1a(16) =237a(17) =2410a(18) =2410a(19) =237a(20) =1a(21) =1a(22) =722a(23) =22007a(24) =67740a(25) =22007a(26) =722a(27) =1a(28) =1a(29) =2179