Triangle of generalized Eulerian numbers T(n,k) = <n,k>_3 read by rows, n >= 1, 0 <= k <= 3*(n-1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =4a(7) =11a(8) =23a(9) =11a(10) =4a(11) =1a(12) =1a(13) =11a(14) =72a(15) =325a(16) =595a(17) =595a(18) =325a(19) =72a(20) =11a(21) =1a(22) =1a(23) =26a(24) =367a(25) =3368a(26) =14679a(27) =34679a(28) =46800a(29) =34679