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A260473 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101 1
840, 2562, 13198, 51552, 228287, 1095328, 4771920, 20881559, 95279821, 425856847, 1884583524, 8455381667, 37878158698, 168740477794, 754075134087, 3373768933461, 15065098940991, 67292893064782, 300807873404901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A260475

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +61*a(n-3) +47*a(n-4) -60*a(n-5) -990*a(n-6) -1180*a(n-7) +354*a(n-8) +8249*a(n-9) +7597*a(n-10) -2933*a(n-11) -30551*a(n-12) -20348*a(n-13) +5544*a(n-14) +63469*a(n-15) +26659*a(n-16) -6985*a(n-17) -78855*a(n-18) -15509*a(n-19) -12385*a(n-20) +39531*a(n-21) +12054*a(n-22) +85518*a(n-23) +66382*a(n-24) -15499*a(n-25) -168797*a(n-26) -83743*a(n-27) +112672*a(n-28) -36620*a(n-29) -121694*a(n-30) -110222*a(n-31) +624893*a(n-32) +313958*a(n-33) -79390*a(n-34) -1353319*a(n-35) -160693*a(n-36) +287985*a(n-37) +1390733*a(n-38) -156458*a(n-39) -359710*a(n-40) -1048350*a(n-41) +317642*a(n-42) +250783*a(n-43) +577850*a(n-44) -66442*a(n-45) -96962*a(n-46) -161332*a(n-47) -21930*a(n-48) -4800*a(n-49) +17136*a(n-50) for n>57

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A260475

Sequence in context: A045477 A232099 A005952 * A335141 A177021 A276161

Adjacent sequences:  A260470 A260471 A260472 * A260474 A260475 A260476

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 26 2015

STATUS

approved

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Last modified September 18 16:22 EDT 2020. Contains 337170 sequences. (Running on oeis4.)