Number of nX4 0..4 arrays of sums of 2X2 subblocks of some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.
A226990
Number of nX4 0..4 arrays of sums of 2X2 subblocks of some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.
Terms
- a(0) =21a(1) =313a(2) =2820a(3) =24158a(4) =180712a(5) =1187869a(6) =6897735a(7) =35818171a(8) =168412446a(9) =725322952a(10) =2890248513a(11) =10747422169a(12) =37565694126a(13) =124186120157a(14) =390330632256
External references
- oeis: A226990