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 A260837 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101 1
 364, 496, 1224, 2235, 2590, 6232, 13170, 17731, 34192, 77780, 123488, 206695, 457440, 825256, 1336836, 2725379, 5298108, 8851516, 16674798, 33192375, 58277638, 104857040, 206110260, 377809047, 671142648, 1283474236, 2413960656 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A260841 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +a(n-2) +6*a(n-3) -a(n-4) -12*a(n-5) -15*a(n-6) +2*a(n-7) +18*a(n-8) +28*a(n-9) -3*a(n-10) -28*a(n-11) -a(n-12) +9*a(n-13) +12*a(n-14) +10*a(n-15) -19*a(n-16) -36*a(n-17) +4*a(n-18) +10*a(n-19) -4*a(n-20) +23*a(n-21) +a(n-22) -20*a(n-23) +9*a(n-24) +10*a(n-25) -4*a(n-26) +6*a(n-27) +8*a(n-28) -14*a(n-29) +2*a(n-31) -5*a(n-32) +3*a(n-33) for n>34 EXAMPLE Some solutions for n=4 ..0..1..0..0..0..0....1..0..0..0..0..1....1..1..0..0..0..1....1..1..0..0..0..1 ..0..0..0..0..1..1....0..1..0..0..1..1....0..1..0..0..1..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 ..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..1....0..1..0..0..1..1....1..1..0..0..1..0....1..1..0..0..1..0 ..0..0..0..0..0..0....0..1..0..0..0..1....1..0..0..0..0..1....1..0..0..0..1..0 CROSSREFS Cf. A260841 Sequence in context: A115464 A004534 A256087 * A272359 A023697 A038468 Adjacent sequences:  A260834 A260835 A260836 * A260838 A260839 A260840 KEYWORD nonn AUTHOR R. H. Hardin, Aug 01 2015 STATUS approved

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Last modified December 5 17:28 EST 2021. Contains 349557 sequences. (Running on oeis4.)