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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.

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: A195808 A381621 A364308 * A304607 A168626 A382231

Adjacent sequences: A260835 A260836 A260837 * A260839 A260840 A260841