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A260013
Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101
1
828, 2738, 18356, 84050, 294336, 1210568, 5674360, 24724512, 101249348, 428893472, 1872332800, 8043685448, 34055537824, 145297154312, 624337715924, 2672815345922, 11402714613024, 48733917928200, 208637923678800
OFFSET
1,1
COMMENTS
Column 6 of A260015
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +20*a(n-3) +125*a(n-4) -59*a(n-5) +18*a(n-6) -729*a(n-7) -3826*a(n-8) +489*a(n-9) +532*a(n-10) +7403*a(n-11) +38557*a(n-12) -313*a(n-13) -3705*a(n-14) -29029*a(n-15) -166609*a(n-16) -5164*a(n-17) +1596*a(n-18) +44987*a(n-19) +326610*a(n-20) +1811*a(n-21) +7895*a(n-22) -34542*a(n-23) -295044*a(n-24) +7102*a(n-25) -5217*a(n-26) +14136*a(n-27) +117306*a(n-28) -4662*a(n-29) +351*a(n-30) -2889*a(n-31) -18387*a(n-32) +729*a(n-33) +243*a(n-35) +729*a(n-36) for n>37
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..0..0..1....0..0..0..1..0..0..0..1....0..0..0..1..0..1..0..1
..1..0..1..0..1..0..1..0....1..0..1..0..1..0..0..0....1..0..1..0..0..0..1..0
..0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..1
..1..0..1..0..1..0..1..0....0..0..1..0..1..0..1..0....0..0..1..0..1..0..1..0
..0..0..0..1..0..1..0..1....0..1..0..0..0..1..0..0....0..0..0..1..0..0..0..1
..1..0..1..0..0..0..0..0....0..0..1..0..1..0..0..0....0..0..1..0..1..0..1..0
CROSSREFS
Sequence in context: A104281 A217551 A179169 * A234085 A226536 A099052
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 13 2015
STATUS
approved