A recursive triangle sequence: A(n,k)=k^2*(A(n - 1, k - 1) + A(n - 1, k)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =1a(6) =1a(7) =36a(8) =81a(9) =1a(10) =1a(11) =148a(12) =1053a(13) =1312a(14) =1a(15) =1a(16) =596a(17) =10809a(18) =37840a(19) =32825a(20) =1a(21) =1a(22) =2388a(23) =102645a(24) =778384a(25) =1766625a(26) =1181736a(27) =1a(28) =1a(29) =9556