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 increasing order.

A166815

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 increasing order.

Terms

    a(0) =0a(1) =8a(2) =67a(3) =268a(4) =772a(5) =1836a(6) =3843a(7) =7336a(8) =13056a(9) =21984a(10) =35387a(11) =54868a(12) =82420a(13) =120484a(14) =172011a(15) =240528a(16) =330208a(17) =445944a(18) =593427a(19) =779228a(20) =1010884a(21) =1296988a(22) =1647283a(23) =2072760a(24) =2585760a(25) =3200080a(26) =3931083a(27) =4795812a(28) =5813108a(29) =7003732

External references