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 nondecreasing order.

A166798

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 nondecreasing order.

Terms

    a(0) =0a(1) =0a(2) =105a(3) =767a(4) =3160a(5) =9756a(6) =25163a(7) =57293a(8) =118936a(9) =229824a(10) =419277a(11) =729531a(12) =1219856a(13) =1971580a(14) =3094143a(15) =4732313a(16) =7074704a(17) =10363744a(18) =14907249a(19) =21091767a(20) =29397864a(21) =40417532a(22) =54873907a(23) =73643493a(24) =97781096a(25) =128547680

External references