Number of n X 3 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 decreasing order.
A166842
Number of n X 3 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 decreasing order.
Terms
- a(0) =1a(1) =14a(2) =78a(3) =284a(4) =807a(5) =1946a(6) =4172a(7) =8184a(8) =14973a(9) =25894a(10) =42746a(11) =67860a(12) =104195a(13) =155442a(14) =226136a(15) =321776a(16) =448953a(17) =615486a(18) =830566a(19) =1104908a(20) =1450911
External references
- oeis: A166842