A227101 Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having a sum of two, with rows and columns of the latter in lexicographically nondecreasing order

11, 136, 1084, 8427, 60039, 384591, 2209056, 11456481, 54141062, 235262503, 947783225, 3566095007, 12613787982, 42187331840, 134097083832, 406916965311, 1183456563350, 3310261263895, 8932219958483, 23313790229352, 59000955033387

Offset

1,1

Comments

Column 4 of A227103

Links

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

R. H. Hardin, Empirical polynomial of degree 31

Formula

Empirical polynomial of degree 31 (see link above)

Example

Some solutions for n=4
..0..1..0..0....0..0..0..0....0..0..0..0....0..0..1..0....0..0..0..1
..0..0..0..0....0..0..0..1....0..0..1..0....0..0..1..0....0..1..1..1
..0..0..0..0....0..1..0..0....0..1..0..0....0..1..0..0....1..0..1..0
..0..0..0..0....1..0..0..1....1..0..1..0....0..1..1..0....1..1..1..1

Crossrefs

Sequence in context: A157773 A336180 A209487 * A024143 A057718 A123800

Adjacent sequences: A227098 A227099 A227100 * A227102 A227103 A227104

Keyword

nonn

Author

R. H. Hardin Jul 01 2013

Status

approved