Number of (n+1)X3 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.
A204224
Number of (n+1)X3 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =450a(1) =4539a(2) =44641a(3) =312001a(4) =2173565a(5) =12097076a(6) =67329896a(7) =320850651a(8) =1529688095a(9) =6522838147a(10) =27826525857a(11) =109309929157a(12) =429561634288
External references
- oeis: A204224