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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 1
11, 136, 1084, 8427, 60039, 384591, 2209056, 11456481, 54141062, 235262503, 947783225, 3566095007, 12613787982, 42187331840, 134097083832, 406916965311, 1183456563350, 3310261263895, 8932219958483, 23313790229352, 59000955033387 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)