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A260763 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011 1
350, 481, 1234, 2449, 3328, 7645, 16095, 25501, 51049, 109299, 189890, 355743, 749522, 1385493, 2541076, 5180564, 9948565, 18318480, 36192443, 70704397, 131994545, 255359264, 500237231, 947181697, 1813491686, 3537676433 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A260767

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-3) +12*a(n-4) +2*a(n-5) -36*a(n-6) -90*a(n-7) -79*a(n-8) +45*a(n-9) +240*a(n-10) +403*a(n-11) +259*a(n-12) -213*a(n-13) -750*a(n-14) -1071*a(n-15) -660*a(n-16) +323*a(n-17) +1344*a(n-18) +1874*a(n-19) +1401*a(n-20) +10*a(n-21) -1324*a(n-22) -2235*a(n-23) -2041*a(n-24) -779*a(n-25) +478*a(n-26) +1614*a(n-27) +1909*a(n-28) +1173*a(n-29) +407*a(n-30) -498*a(n-31) -1085*a(n-32) -747*a(n-33) -601*a(n-34) -44*a(n-35) +248*a(n-36) +253*a(n-37) +251*a(n-38) +56*a(n-39) +76*a(n-40) -88*a(n-41) +19*a(n-42) -20*a(n-43) -51*a(n-44) +28*a(n-45) -37*a(n-46) +12*a(n-47) +6*a(n-48) -2*a(n-49) +6*a(n-50) -4*a(n-51) +a(n-52) for n>58

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A260767

Sequence in context: A138944 A043619 A249430 * A109761 A109762 A074055

Adjacent sequences:  A260760 A260761 A260762 * A260764 A260765 A260766

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 30 2015

STATUS

approved

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Last modified November 13 17:34 EST 2019. Contains 329106 sequences. (Running on oeis4.)