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A259511 Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0101 0111 1
245, 2219, 20293, 189211, 1769635, 16602297, 155863519, 1464104971, 13754727159, 129236342101, 1214294685989, 11409748154969, 107208173420527, 1007356261075135, 9465372066487451, 88939216552231467, 835696481415998163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A259515

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +61*a(n-2) -432*a(n-3) -936*a(n-4) +7415*a(n-5) +3311*a(n-6) -51997*a(n-7) +14878*a(n-8) +156464*a(n-9) -95087*a(n-10) -197708*a(n-11) +149042*a(n-12) +84334*a(n-13) -69090*a(n-14)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A259515

Sequence in context: A237161 A056264 A154080 * A023097 A098195 A214474

Adjacent sequences:  A259508 A259509 A259510 * A259512 A259513 A259514

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 29 2015

STATUS

approved

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Last modified September 18 23:30 EDT 2020. Contains 337175 sequences. (Running on oeis4.)