Number of (n+1)X5 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

A204035

Number of (n+1)X5 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

Terms

    a(0) =286a(1) =1758a(2) =10505a(3) =44366a(4) =189580a(5) =642272a(6) =2198077a(7) =6415866a(8) =18855400a(9) =49463034a(10) =130378965a(11) =316145840a(12) =769485458a(13) =1759764220a(14) =4037835608a(15) =8842012560a(16) =19423451542a(17) =41206754874a(18) =87691553223a(19) =181894892784a(20) =378439038413

External references