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

6, 40, 202, 1079, 5820, 30620, 153955, 732611, 3296920, 14061299, 56985160, 220076717, 812449972, 2875724911, 9787354849, 32113565709, 101824379739, 312674532585, 931663492446, 2698483534259, 7609773537119, 20924215257349

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: A210424 A367778 A292029 * A232568 A288637 A059021

Adjacent sequences: A227121 A227122 A227123 * A227125 A227126 A227127

Keyword

nonn

Author

R. H. Hardin Jul 01 2013

Status

approved