Matrix square of triangle A107671.

Terms

a(0) =1a(1) =24a(2) =4a(3) =2268a(4) =135a(5) =9a(6) =461056a(7) =15936a(8) =448a(9) =16a(10) =160977375a(11) =3789250a(12) =69000a(13) =1125a(14) =25a(15) =85624508376a(16) =1485395280a(17) =19994688a(18) =223560a(19) =2376a(20) =36a(22) =862907827866a(23) =9138674195a(24) =79086196a(25) =596820a(26) =4459a(27) =49