Number of 3Xn arrays containing n copies of 0..3-1 with row sums and column sums nondecreasing.
A267992
Number of 3Xn arrays containing n copies of 0..3-1 with row sums and column sums nondecreasing.
Terms
- a(0) =1a(1) =21a(2) =145a(3) =1122a(4) =7886a(5) =58446a(6) =405196a(7) =2865756a(8) =19652430a(9) =135666717a(10) =917861737a(11) =6247996468a(12) =41874859669a(13) =281884085368
External references
- oeis: A267992