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A185462 Number of (n+1)X5 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 1
218, 672, 2766, 13977, 49670, 231636, 798330, 3709535, 12773958, 59358300, 204384986, 949713803, 3270113366, 15195208008, 52321104606, 243120127107, 837126587718, 3889870442680, 13393847713706, 62237101136015 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A185467

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=14*a(n-2)+27*a(n-4)+75*a(n-6)+77*a(n-8)+32*a(n-10)+a(n-12)-a(n-14) for n>20

EXAMPLE

Some solutions for 3X5

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

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

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

CROSSREFS

Sequence in context: A260496 A038595 A045239 * A253740 A253733 A241102

Adjacent sequences:  A185459 A185460 A185461 * A185463 A185464 A185465

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

STATUS

approved

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Last modified September 28 19:16 EDT 2021. Contains 347717 sequences. (Running on oeis4.)