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A260980 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101 9
48, 91, 91, 204, 133, 204, 483, 239, 239, 483, 1146, 481, 372, 481, 1146, 2755, 925, 732, 732, 925, 2755, 6526, 1873, 1288, 1513, 1288, 1873, 6526, 15419, 3683, 2576, 2714, 2714, 2576, 3683, 15419, 36518, 7321, 4688, 5506, 4592, 5506, 4688, 7321, 36518 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....48....91...204...483...1146...2755...6526..15419..36518...86831..206258

....91...133...239...481....925...1873...3683...7321..14439...28529...56363

...204...239...372...732...1288...2576...4688...8760..15964...30062...55496

...483...481...732..1513...2714...5506...9728..18578..33658...66832..122644

..1146...925..1288..2714...4592...9144..14672..29768..50432..101372..171124

..2755..1873..2576..5506...9144..18706..30418..62878.107802..218342..372200

..6526..3683..4688..9728..14672..30418..45504..95248.145748..298612..459656

.15419..7321..8760.18578..29768..62878..95248.195280.303930..632432.1010202

.36518.14439.15964.33658..50432.107802.145748.303930.441072..950478.1351340

.86831.28529.30062.66832.101372.218342.298612.632432.950478.2093846.3098000

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..923

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 8] for n>9

k=2: [order 11] for n>14

k=3: [order 14] for n>18

k=4: [order 19] for n>26

k=5: [order 28] for n>34

k=6: [order 45] for n>51

k=7: [order 53] for n>63

EXAMPLE

Some solutions for n=4 k=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A224546 A247720 A204647 * A260070 A260973 A260063

Adjacent sequences:  A260977 A260978 A260979 * A260981 A260982 A260983

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Aug 06 2015

STATUS

approved

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Last modified June 19 08:41 EDT 2018. Contains 305581 sequences. (Running on oeis4.)