T(n,k) = Number of n X k nonnegative integer arrays with each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it).

A202549

T(n,k) = Number of n X k nonnegative integer arrays with each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =8a(12) =18a(13) =8a(14) =1a(15) =1a(16) =16a(17) =86a(18) =86a(19) =16a(20) =1a(21) =1a(22) =32a(23) =422a(24) =1094a(25) =422a(26) =32a(27) =1a(28) =1a(29) =64

External references