W. Lang Nov 12 2007 a(n,m) tabl head (triangle) for A134285, called s2(3)'. n\m 1 2 3 4 5 6 7 8 9 10... 1 1 0 0 0 0 0 0 0 0 0 2 3 1 0 0 0 0 0 0 0 0 3 10 3 1 0 0 0 0 0 0 0 4 35 19 3 1 0 0 0 0 0 0 5 126 65 19 3 1 0 0 0 0 0 6 462 331 92 19 3 1 0 0 0 0 7 1716 1190 421 92 19 3 1 0 0 0 8 6435 5587 1805 502 92 19 3 1 0 0 9 24310 20613 8771 2075 502 92 19 3 1 0 10 92378 92821 35726 10616 2318 502 92 19 3 1 . . . The first column gives A001700(n-1): [1,3,10,35,126,462,1716,6435,24310,92378,...]. The row sums give A134826: [1,4,14,58,214,908,3442,14444,56386,234476,...]. The alternating row sums give A134827: [1,2,8,18,78,206,872,2226,10820,26558,...]. #################################### e.o.f. #########################################