a(n,m) tabf head (staircase) for A070829 (fill out empty places with zeros) n\m 1 2 3 4 5 6 7 8 9 10 11 2 1 3 0 1 4 1 5 0 0 1 6 1 1 7 0 0 0 1 8 1 9 0 1 10 1 0 1 11 0 0 0 0 1 12 1 1 13 0 0 0 0 0 1 14 1 0 0 1 15 0 1 1 16 1 17 0 0 0 0 0 0 1 18 1 1 19 0 0 0 0 0 0 0 1 20 1 0 1 21 0 1 0 1 22 1 0 0 0 1 23 0 0 0 0 0 0 0 0 1 24 1 1 25 0 0 1 26 1 0 0 0 0 1 27 0 1 28 1 0 0 1 29 0 0 0 0 0 0 0 0 0 1 30 1 1 1 31 0 0 0 0 0 0 0 0 0 0 1 32 1 . . .