Number of nX3 0..2 arrays with rows and columns in nondecreasing order.
A184131
Number of nX3 0..2 arrays with rows and columns in nondecreasing order.
Terms
- a(0) =10a(1) =112a(2) =1169a(3) =10020a(4) =70243a(5) =414848a(6) =2126064a(7) =9681099a(8) =39886396a(9) =150795172a(10) =528970102a(11) =1737120632a(12) =5379657012a(13) =15806662276a(14) =44290055378a(15) =118862126126a(16) =306675218582a(17) =763173754851
External references
- oeis: A184131