Array T(n,k) = dismal sum n+k (n >= 0, k >= 0) read by antidiagonals. 0, 1, 1, 2, 1, 2, 3, 2, 2, 3, 4, 3, 2, 3, 4, 5, 4, 3, 3, 4, 5, 6, 5, 4, 3, 4, 5, 6, 7, 6, 5, 4, 4, 5
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