References to A066202

Array T(n,k) (n>=1, k>=1) read by antidiagonals: T(n,n) = 1 for all n; fill in array above diagonal by symmetry; for row n, starting at diagonal T(n,n)=1, for k > n, T(n,k) = T(n,k-1)-(k-1) if this is positive and has not already appeared in this row, otherwise T(n,k) = T(n,k-1)+(k-1).
1, 2, 2, 4, 1, 4, 7, 3, 3, 7, 3, 6, 1, 6, 3, 8, 10, 4, 4, 10, 8, 14, 5, 8, 1, 8, 5, 14, 21, 11, 13

2 seqfan posts