Number of n X 2 1..6 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 decreasing order.
A166840
Number of n X 2 1..6 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 decreasing order.
Terms
- a(0) =0a(1) =0a(2) =30a(3) =728a(4) =5364a(5) =24401a(6) =84279a(7) =242772a(8) =614084a(9) =1407834a(10) =2987248a(11) =5953244a(12) =11262680a(13) =20390851a(14) =35550385a(15) =59981016a(16) =98327320a(17) =157124404a(18) =245414754
External references
- oeis: A166840