Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.
A166836
Number of nX4 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.
Terms
- a(0) =1a(1) =219a(2) =3170a(3) =23464a(4) =124843a(5) =538072a(6) =1990990
External references
- oeis: A166836