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 increasing order.
A166814
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 increasing order.
Terms
- a(0) =0a(1) =6a(2) =25a(3) =66a(4) =140a(5) =260a(6) =441a(7) =700a(8) =1056a(9) =1530a(10) =2145a(11) =2926a(12) =3900a(13) =5096a(14) =6545a(15) =8280a(16) =10336a(17) =12750a(18) =15561a(19) =18810a(20) =22540a(21) =26796a(22) =31625a(23) =37076a(24) =43200a(25) =50050a(26) =57681a(27) =66150a(28) =75516a(29) =85840
External references
- oeis: A166814