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A227164 Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of one or less, with rows and columns of the latter in lexicographically nondecreasing order 1
6, 66, 558, 4528, 37012, 283430, 2010569, 13174529, 79606861, 445291143, 2319506105, 11318251449, 52022806997, 226357815317, 936451009248, 3697654793472, 13982230433991, 50782778554993, 177615062917012 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A227165
LINKS
FORMULA
Empirical polynomial of degree 39 (see link above)
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..0..0..0..0....0..0..0..0..1....0..1..1..0..0....0..0..1..0..0
..0..1..1..1..0....0..1..0..0..0....0..1..0..0..1....0..1..0..0..0
..0..0..0..0..1....0..1..0..0..1....0..1..0..1..0....0..0..0..1..0
CROSSREFS
Sequence in context: A062184 A119214 A075138 * A043041 A243719 A156237
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 03 2013
STATUS
approved

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Last modified March 1 08:46 EST 2024. Contains 370430 sequences. (Running on oeis4.)