W. Lang. Oct 09 2008 a(n,m) tabl head (triangle) for A145357 n\m 1 2 3 4 5 6 7 8 9 10... 1 1 0 0 0 0 0 0 0 0 0 2 6 1 0 0 0 0 0 0 0 0 3 42 6 1 0 0 0 0 0 0 0 4 336 78 6 1 0 0 0 0 0 0 5 3024 588 78 6 1 0 0 0 0 0 6 30240 6804 804 78 6 1 0 0 0 0 7 332640 62496 8316 804 78 6 1 0 0 0 8 3991680 753984 85176 9612 804 78 6 1 0 0 9 51891840 8273664 1021608 94248 9612 804 78 6 1 0 10 726485760 109118016 11394432 1157688 102024 9612 804 78 6 1 . . . The row sums give A145358 = [1, 7, 49, 421, 3697, 37933, 404341, 4841341, 61291861, 848268421,...]. They coincide with the row sums of array A145356. The first columns are A001725(n+4)= (n+4)!/5!, A145359, A145360,... ######################################### e.o.f. ####################################################