Number of nX2 1..3 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.

A166796

Number of nX2 1..3 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) =6a(2) =26a(3) =69a(4) =146a(5) =270a(6) =456a(7) =721a(8) =1084a(9) =1566a(10) =2190a(11) =2981a(12) =3966a(13) =5174a(14) =6636a(15) =8385a(16) =10456a(17) =12886a(18) =15714a(19) =18981a(20) =22730a(21) =27006a(22) =31856a(23) =37329a(24) =43476a(25) =50350a(26) =58006a(27) =66501a(28) =75894a(29) =86246

External references