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A260244 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001 1
635, 1235, 3287, 5733, 14045, 42143, 85491, 178543, 492457, 1191315, 2445353, 5956161, 15293067, 33742487, 75896973, 191097599, 450742619, 1002739961, 2404247583, 5842913003, 13329225455, 30884432185, 74706438775, 175270605465 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A260248

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-3) +19*a(n-4) +6*a(n-5) -68*a(n-6) -155*a(n-7) -159*a(n-8) +51*a(n-9) +488*a(n-10) +727*a(n-11) +604*a(n-12) -416*a(n-13) -1228*a(n-14) -1897*a(n-15) -678*a(n-16) +24*a(n-17) +2380*a(n-18) +2386*a(n-19) +3096*a(n-20) -1701*a(n-21) -5002*a(n-22) -8742*a(n-23) -717*a(n-24) +7855*a(n-25) +11980*a(n-26) +1057*a(n-27) -6122*a(n-28) -7163*a(n-29) -3418*a(n-30) -2083*a(n-31) -968*a(n-32) -530*a(n-33) +734*a(n-34) +514*a(n-35) +1238*a(n-36) +874*a(n-37) +152*a(n-38) -58*a(n-39) -209*a(n-40) -66*a(n-41) -20*a(n-42) +9*a(n-43) -5*a(n-44) -2*a(n-45) for n>47

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260248

Sequence in context: A177214 A252124 A112137 * A250581 A061623 A253506

Adjacent sequences:  A260241 A260242 A260243 * A260245 A260246 A260247

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 20 2015

STATUS

approved

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Last modified September 20 10:51 EDT 2021. Contains 347584 sequences. (Running on oeis4.)