Number of nX2 1..5 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.

A166827

Number of nX2 1..5 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) =0a(1) =0a(2) =55a(3) =478a(4) =2167a(5) =7125a(6) =19234a(7) =45351a(8) =96802a(9) =191358a(10) =355785a(11) =629068a(12) =1066417a(13) =1744171a(14) =2765724a(15) =4268605a(16) =6432852a(17) =9490828a(18) =13738635a(19) =19549290a(20) =27387835a(21) =37828561a(22) =51574534a(23) =69479619a(24) =92573206a(25) =122087850

External references