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A259720
Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011
1
312, 556, 1244, 2218, 3120, 7076, 13920, 21398, 42208, 89194, 149000, 268204, 564516, 1024388, 1778248, 3578760, 6862832, 12025406, 23011356, 45100872, 81318516, 150518778, 293879516, 545191574, 996711856, 1914996584, 3620486244
OFFSET
1,1
COMMENTS
Column 5 of A259723
LINKS
FORMULA
Empirical: a(n) = 8*a(n-3) +15*a(n-4) -22*a(n-6) -92*a(n-7) -98*a(n-8) +28*a(n-9) +206*a(n-10) +450*a(n-11) +373*a(n-12) -220*a(n-13) -808*a(n-14) -1314*a(n-15) -956*a(n-16) +726*a(n-17) +1849*a(n-18) +2534*a(n-19) +1881*a(n-20) -1358*a(n-21) -2690*a(n-22) -3590*a(n-23) -3186*a(n-24) +1596*a(n-25) +2896*a(n-26) +4054*a(n-27) +4546*a(n-28) -1350*a(n-29) -2493*a(n-30) -3336*a(n-31) -4943*a(n-32) +904*a(n-33) +1403*a(n-34) +1606*a(n-35) +3667*a(n-36) -382*a(n-37) -410*a(n-38) -346*a(n-39) -1710*a(n-40) +80*a(n-41) +42*a(n-42) -38*a(n-43) +465*a(n-44) +6*a(n-46) +36*a(n-47) -64*a(n-48) -4*a(n-51) +3*a(n-52)
EXAMPLE
Some solutions for n=4
..1..0..0..0..0..0..0....0..0..0..0..0..0..1....0..0..0..0..1..1..0
..1..0..0..1..0..0..0....0..0..0..0..0..1..1....0..0..0..0..0..0..0
..0..0..0..1..0..0..1....0..0..1..0..0..0..0....0..1..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..1..0..0..0..0....0..1..0..0..1..0..0
..1..0..0..0..0..0..0....0..0..0..0..0..1..0....0..0..0..0..1..0..0
..0..0..0..1..1..0..0....0..0..0..0..0..1..0....0..0..0..0..0..0..0
CROSSREFS
Sequence in context: A308002 A112542 A238099 * A011774 A011251 A043360
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 03 2015
STATUS
approved