a(n,r) tabl head (triangle) for A105806 (nr. of partitions of n with non-negative Dyson rank r) n\r 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 . . . 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 5 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 6 1 2 1 1 0 1 0 0 0 0 0 0 0 0 0 0 7 3 1 2 1 1 0 1 0 0 0 0 0 0 0 0 0 8 2 3 2 2 1 1 0 1 0 0 0 0 0 0 0 0 9 4 3 3 2 2 1 1 0 1 0 0 0 0 0 0 0 10 4 5 3 4 2 2 1 1 0 1 0 0 0 0 0 0 11 6 5 6 3 4 2 2 1 1 0 1 0 0 0 0 0 12 7 8 6 6 4 4 2 2 1 1 0 1 0 0 0 0 13 11 8 9 7 6 4 4 2 2 1 1 0 1 0 0 0 14 11 13 10 10 7 7 4 4 2 2 1 1 0 1 0 0 15 16 14 15 11 11 7 7 4 4 2 2 1 1 0 1 0 16 19 20 16 17 12 11 8 7 4 4 2 2 1 1 0 1 . . .