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A227124 Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order 1
6, 40, 202, 1079, 5820, 30620, 153955, 732611, 3296920, 14061299, 56985160, 220076717, 812449972, 2875724911, 9787354849, 32113565709, 101824379739, 312674532585, 931663492446, 2698483534259, 7609773537119, 20924215257349 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A227125

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 39

FORMULA

Empirical polynomial of degree 39 (see link above)

EXAMPLE

Some solutions for n=4

..1..1..1..1..0....1..0..0..0..0....1..1..0..0..0....0..0..0..0..0

..1..1..1..1..0....1..0..0..0..1....1..0..0..0..0....0..1..1..1..1

..1..0..0..0..0....1..0..0..0..0....1..0..0..1..1....0..1..1..1..1

..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....0..1..1..1..1

CROSSREFS

Sequence in context: A055344 A210424 A292029 * A232568 A288637 A059021

Adjacent sequences:  A227121 A227122 A227123 * A227125 A227126 A227127

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 01 2013

STATUS

approved

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Last modified June 19 13:11 EDT 2019. Contains 324222 sequences. (Running on oeis4.)