Number of (n+1)X4 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.
A204034
Number of (n+1)X4 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =121a(1) =603a(2) =2928a(3) =10505a(4) =37642a(5) =111578a(6) =330509a(7) =863435a(8) =2254026a(9) =5394662a(10) =12906149a(11) =29037224a(12) =65337510a(13) =140736855a(14) =303340170a(15) =634000207a(16) =1326522462a(17) =2717180447a(18) =5573314419a(19) =11270539628a(20) =22825534613a(21) =45808619416a(22) =92067615036a(23) =184020632660
External references
- oeis: A204034