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A260137 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111 1
1880, 8998, 61914, 266156, 1340176, 7839850, 39696994, 200149838, 1081436482, 5672351526, 29202675242, 153702924266, 807944925446, 4206057040818, 22004575402798, 115383468865762, 603019794931990, 3152862366134910 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A260138
LINKS
FORMULA
Empirical: a(n) = a(n-1) +3*a(n-2) +112*a(n-3) +101*a(n-4) -58*a(n-5) -3612*a(n-6) -5370*a(n-7) -1040*a(n-8) +60962*a(n-9) +85530*a(n-10) +30213*a(n-11) -547937*a(n-12) -706102*a(n-13) -360232*a(n-14) +3054976*a(n-15) +3266750*a(n-16) +2000118*a(n-17) -11214142*a(n-18) -9189754*a(n-19) -5342978*a(n-20) +29875060*a(n-21) +16617176*a(n-22) +7719994*a(n-23) -60637752*a(n-24) -23269512*a(n-25) -8579728*a(n-26) +86059704*a(n-27) +26401696*a(n-28) +13602048*a(n-29) -78987136*a(n-30) -15397504*a(n-31) -14402976*a(n-32) +45323648*a(n-33) +2566528*a(n-34) +3310848*a(n-35) -17071872*a(n-36) -67584*a(n-37) +1142784*a(n-38) +4982784*a(n-39) +399360*a(n-40) -516096*a(n-42) for n>44
EXAMPLE
Some solutions for n=3
..0..1..0..0..0..1..1..1..0....0..1..0..1..0..1..0..1..1
..1..0..1..0..1..0..1..0..1....1..0..1..1..1..0..1..0..1
..0..1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1..0
..1..0..1..0..0..0..1..1..1....0..0..1..0..1..0..1..0..1
..0..0..0..1..0..1..0..1..0....0..1..0..0..0..1..0..1..0
CROSSREFS
Sequence in context: A358147 A235193 A072494 * A246478 A237103 A222799
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 17 2015
STATUS
approved

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Last modified April 18 13:29 EDT 2024. Contains 371780 sequences. (Running on oeis4.)