T(n, k) = Eulerian1(n - k, k), for n >= 0 and 0 <= k <= floor(n/2). Triangle read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =1a(5) =1a(6) =1a(7) =4a(8) =0a(9) =1a(10) =11a(11) =1a(12) =1a(13) =26a(14) =11a(15) =0a(16) =1a(17) =57a(18) =66a(19) =1a(20) =1a(21) =120a(22) =302a(23) =26a(24) =0a(25) =1a(26) =247a(27) =1191a(28) =302a(29) =1