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Search: id:A166840
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| A166840 |
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Number of nX2 1..6 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. |
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+0
1
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| 0, 0, 30, 728, 5364, 24401, 84279, 242772, 614084, 1407834, 2987248, 5953244, 11262680, 20390851, 35550385, 59981016, 98327320, 157124404, 245414754
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OFFSET
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1,3
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EXAMPLE
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All solutions for n=3
...4.3...4.3...3.1...3.1...3.1...3.1...3.2...3.2...3.2...3.2...3.1...3.1...3.2
...5.1...5.2...4.2...4.2...4.5...4.6...4.1...4.1...4.5...4.6...5.4...5.2...5.4
...6.2...6.1...5.6...6.5...6.2...5.2...5.6...6.5...6.1...5.1...6.2...6.4...6.1
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...3.2...4.1...4.1...4.2...4.2...2.1...2.1...2.1...2.1...2.1...2.1...2.1...2.1
...5.1...5.3...5.2...5.3...5.1...3.4...3.4...3.5...3.5...3.6...3.6...4.3...4.3
...6.4...6.2...6.3...6.1...6.3...5.6...6.5...6.4...4.6...5.4...4.5...5.6...6.5
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...2.1...2.1...2.1...2.1
...4.5...4.6...5.3...5.4
...6.3...5.3...6.4...6.3
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CROSSREFS
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Sequence in context: A027475 A035520 A122186 this_sequence A166828 A053509 A089507
Adjacent sequences: A166837 A166838 A166839 this_sequence A166841 A166842 A166843
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net) Oct 21 2009
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