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Search: id:A166800
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A166800 Number of nX2 1..7 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 nondecreasing order. +0
1
0, 0, 0, 2016, 23485, 139417, 583175, 1954287, 5607782, 14335282, 33495930, 72818046, 149173467, 290729595, 543013497 (list; graph; listen)
OFFSET

1,4

EXAMPLE

Some solutions for n=4

...1.7...1.7...1.4...1.4...1.5...1.6...1.2...1.3...1.5...2.2...1.7...2.3...1.7

...2.3...2.7...3.2...3.3...1.7...2.6...3.6...1.5...2.4...4.5...3.3...6.4...3.2

...4.5...3.4...5.5...5.2...3.2...5.3...4.6...2.7...2.6...6.3...4.5...7.1...4.4

...4.6...6.5...6.7...7.6...4.6...7.4...5.7...6.4...3.7...7.1...6.2...7.5...5.6

------

...1.3...2.3...1.4...1.4...2.2...1.2...2.5...1.5...1.1...1.2...1.6...2.3...1.2

...2.6...5.3...5.2...2.5...3.5...4.2...3.5...3.2...2.7...5.2...2.5...5.1...3.4

...5.4...6.4...5.3...7.3...4.6...5.6...4.1...7.4...3.5...6.3...4.4...7.4...5.7

...5.7...7.1...6.7...7.6...7.1...7.3...7.6...7.6...6.4...7.4...7.3...7.6...6.6

CROSSREFS

Sequence in context: A076582 A125491 A166818 this_sequence A110851 A119517 A119423

Adjacent sequences: A166797 A166798 A166799 this_sequence A166801 A166802 A166803

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Oct 21 2009

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Last modified March 20 09:10 EDT 2010. Contains 173642 sequences.


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