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A260370 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111 9
48, 78, 78, 208, 127, 208, 436, 342, 342, 436, 616, 700, 912, 700, 616, 1378, 896, 2014, 2014, 896, 1378, 2880, 2047, 2532, 4633, 2532, 2047, 2880, 4904, 4438, 5806, 5326, 5326, 5806, 4438, 4904, 9776, 6674, 13632, 12858, 6144, 12858, 13632, 6674, 9776 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....48....78...208....436....616...1378....2880....4904....9776....19458

....78...127...342....700....896...2047....4438....6674...12878....27877

...208...342...912...2014...2532...5806...13632...20576...39376....91830

...436...700..2014...4633...5326..12858...32488...46993...89140...223963

...616...896..2532...5326...6144..15440...37948...52390..101664...257566

..1378..2047..5806..12858..15440..38370...98032..140897..274244...711411

..2880..4438.13632..32488..37948..98032..265120..390138..774416..2085610

..4904..6674.20576..46993..52390.140897..390138..551542.1079598..3047471

..9776.12878.39376..89140.101664.274244..774416.1079598.2092680..6087830

.19458.27877.91830.223963.257566.711411.2085610.3047471.6087830.17786146

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..544

FORMULA

Empirical for column k:

k=1: a(n) = a(n-1) -a(n-2) +5*a(n-3) -a(n-4) +5*a(n-5) -3*a(n-6) -a(n-7)

k=2: [order 12]

k=3: [order 28] for n>30

k=4: [order 44] for n>46

k=5: [order 64] for n>66

EXAMPLE

Some solutions for n=4 k=4

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

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

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

..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

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

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

CROSSREFS

Sequence in context: A143722 A261709 A261704 * A260363 A261553 A110229

Adjacent sequences:  A260367 A260368 A260369 * A260371 A260372 A260373

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jul 23 2015

STATUS

approved

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Last modified December 13 12:37 EST 2019. Contains 329968 sequences. (Running on oeis4.)