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A259641 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001 1
940, 4499, 30957, 133078, 670088, 3919925, 19848497, 100074919, 540718241, 2836175763, 14601337621, 76851462133, 403972462723, 2103028520409, 11002287701399, 57691734432881, 301509897465995, 1576431183067455 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A259642

LINKS

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

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=4

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

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

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

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

CROSSREFS

Cf. A259642

Sequence in context: A176376 A031902 A204072 * A200428 A104917 A052238

Adjacent sequences:  A259638 A259639 A259640 * A259642 A259643 A259644

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 02 2015

STATUS

approved

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Last modified May 24 00:38 EDT 2019. Contains 323528 sequences. (Running on oeis4.)