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A260838 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101 1
644, 796, 1560, 2590, 3828, 8646, 16000, 24508, 49816, 103124, 168848, 309802, 649200, 1162556, 2036072, 4109542, 7787612, 13696344, 26404180, 51320598, 92306500, 172258250, 335370864, 618838306, 1136886200, 2187906876, 4116117684 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 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) +9*a(n-3) +6*a(n-4) -6*a(n-5) -16*a(n-6) -76*a(n-7) -21*a(n-8) +49*a(n-9) +157*a(n-10) +285*a(n-11) +73*a(n-12) -293*a(n-13) -493*a(n-14) -729*a(n-15) -129*a(n-16) +827*a(n-17) +816*a(n-18) +1268*a(n-19) +240*a(n-20) -1378*a(n-21) -504*a(n-22) -1772*a(n-23) -458*a(n-24) +1328*a(n-25) -281*a(n-26) +1801*a(n-27) +864*a(n-28) -856*a(n-29) +1053*a(n-30) -799*a(n-31) -958*a(n-32) +266*a(n-33) -1759*a(n-34) -689*a(n-35) -190*a(n-36) +1158*a(n-37) +925*a(n-38) +2065*a(n-39) +1168*a(n-40) -1992*a(n-41) +631*a(n-42) -2275*a(n-43) -927*a(n-44) +1309*a(n-45) -893*a(n-46) +1275*a(n-47) +371*a(n-48) -451*a(n-49) +409*a(n-50) -375*a(n-51) -87*a(n-52) +87*a(n-53) -93*a(n-54) +57*a(n-55) +7*a(n-56) -7*a(n-57) +7*a(n-58) -3*a(n-59) for n>63

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A260841

Sequence in context: A061324 A089295 A195808 * A304607 A168626 A216023

Adjacent sequences:  A260835 A260836 A260837 * A260839 A260840 A260841

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 01 2015

STATUS

approved

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Last modified December 5 20:39 EST 2021. Contains 349558 sequences. (Running on oeis4.)