Number of nX3 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 nonincreasing order.
A166831
Number of nX3 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 nonincreasing order.
Terms
- a(0) =1a(1) =26a(2) =129a(3) =419a(4) =1093a(5) =2476a(6) =5069a(7) =9605a(8) =17113a(9) =28990a(10) =47081a(11) =73767a(12) =112061a(13) =165712a(14) =239317a(15) =338441a(16) =469745a(17) =641122a(18) =861841a(19) =1142699a(20) =1496181
External references
- oeis: A166831