T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right n+k-6 and value increasing by 0 or 1 with every step right or down.
A252930
T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right n+k-6 and value increasing by 0 or 1 with every step right or down.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =1a(11) =1a(12) =1a(13) =1a(14) =1a(15) =5a(16) =19a(17) =33a(18) =33a(19) =19a(20) =5a(21) =15a(22) =120a(23) =413a(24) =615a(25) =413a(26) =120a(27) =15a(28) =35a(29) =483
External references
- oeis: A252930