Triangle read by rows, T(n,k) = Sum_{j=k..n} j!, 0 <= k <= n.

Terms

a(0) =1a(1) =2a(2) =1a(3) =4a(4) =3a(5) =2a(6) =10a(7) =9a(8) =8a(9) =6a(10) =34a(11) =33a(12) =32a(13) =30a(14) =24a(15) =154a(16) =153a(17) =152a(18) =150a(19) =144a(20) =120a(21) =874a(22) =873a(23) =872a(24) =870a(25) =864a(26) =840a(27) =720a(28) =5914a(29) =5913