Number of nX2 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 nondecreasing order.

A166797

Number of nX2 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 nondecreasing order.

Terms

    a(0) =0a(1) =8a(2) =67a(3) =269a(4) =776a(5) =1846a(6) =3863a(7) =7371a(8) =13112a(9) =22068a(10) =35507a(11) =55033a(12) =82640a(13) =120770a(14) =172375a(15) =240983a(16) =330768a(17) =446624a(18) =594243a(19) =780197a(20) =1012024a(21) =1298318a(22) =1648823a(23) =2074531a(24) =2587784a(25) =3202380a(26) =3933683a(27) =4798737a(28) =5816384a(29) =7007386

External references