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A259952 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101 9
34, 60, 60, 156, 170, 156, 365, 549, 549, 365, 801, 1507, 2438, 1507, 801, 1825, 4128, 8699, 8699, 4128, 1825, 4272, 11933, 30351, 35765, 30351, 11933, 4272, 9840, 34337, 115410, 141619, 141619, 115410, 34337, 9840, 22444, 97374, 438353, 642779, 631626 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....34.....60......156.......365........801........1825.........4272

....60....170......549......1507.......4128.......11933........34337

...156....549.....2438......8699......30351......115410.......438353

...365...1507.....8699.....35765.....141619......642779......2922457

...801...4128....30351....141619.....631626.....3451108.....18564547

..1825..11933...115410....642779....3451108....23837974....159480543

..4272..34337...438353...2922457...18564547...159480543...1328499316

..9840..97374..1615572..12595119...92159926...966996539...9776128436

.22444.277073..5983278..54554391..465579244..6037654361..74163783119

.51509.791655.22387088.241207419.2426793925.39151910960.592385188191

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..480

FORMULA

Empirical for column k:

k=1: a(n) = a(n-1) +a(n-2) +2*a(n-3) +6*a(n-4) -a(n-6) +a(n-7) -a(n-8) for n>9

k=2: [order 9] for n>10

k=3: [order 16] for n>17

k=4: [order 24] for n>27

k=5: [order 40] for n>41

k=6: [order 67] for n>71

EXAMPLE

Some solutions for n=4 k=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A108610 A261314 A119454 * A259945 A303239 A280931

Adjacent sequences:  A259949 A259950 A259951 * A259953 A259954 A259955

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jul 10 2015

STATUS

approved

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Last modified August 5 13:21 EDT 2021. Contains 346469 sequences. (Running on oeis4.)