W. Lang, Oct 10 2008 a(n,m) tabl head (triangle) for A145370 (S1hat(-4)) n\m 1 2 3 4 5 6 7 8 9 10... 1 1 0 0 0 0 0 0 0 0 0 2 4 1 0 0 0 0 0 0 0 0 3 12 4 1 0 0 0 0 0 0 0 4 24 28 4 1 0 0 0 0 0 0 5 24 72 28 4 1 0 0 0 0 0 6 0 264 136 28 4 1 0 0 0 0 7 0 384 456 136 28 4 1 0 0 0 8 0 864 1344 712 136 28 4 1 0 0 9 0 576 4128 2112 712 136 28 4 1 0 10 0 576 7488 7968 3136 712 136 28 4 1 . . . The row sums give A145371 = [1,5,17,57,129,433,1009,3089,7697,20049,...]. They coincide with the ones for the partition array A145369 (M31hat(-4). ################################## e.o.f. ###################################