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A260102 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101 1
472, 1151, 2768, 7119, 18209, 47498, 121800, 316688, 816233, 2113881, 5460501, 14120119, 36498979, 94341890, 243940644, 630594281, 1630241143, 4214482154, 10894955883, 28166443182, 72813856778, 188242874515, 486636771766 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A260106

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +2*a(n-2) -6*a(n-3) +16*a(n-4) -29*a(n-6) +51*a(n-7) -127*a(n-8) -8*a(n-9) +366*a(n-10) -783*a(n-11) +639*a(n-12) +660*a(n-13) -2033*a(n-14) +1968*a(n-15) -1619*a(n-16) +1793*a(n-17) +3541*a(n-18) -7413*a(n-19) -1289*a(n-20) +6703*a(n-21) +3165*a(n-22) -3460*a(n-23) -14509*a(n-24) +8247*a(n-25) +4423*a(n-26) +10598*a(n-27) -15798*a(n-28) -6055*a(n-29) +16608*a(n-30) +24355*a(n-31) -7596*a(n-32) -30915*a(n-33) -13089*a(n-34) +6263*a(n-35) +16611*a(n-36) -4521*a(n-37) -4505*a(n-38) -6759*a(n-39) +14768*a(n-40) +9118*a(n-41) +2224*a(n-42) -14515*a(n-43) -4663*a(n-44) +2666*a(n-45) +5599*a(n-46) -506*a(n-47) -1079*a(n-48) -688*a(n-49) +527*a(n-50) +34*a(n-51) -2*a(n-52) -110*a(n-53) +54*a(n-54) -22*a(n-55) +22*a(n-56) -8*a(n-57) for n>59

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A260106

Sequence in context: A345545 A345798 A235287 * A260135 A259640 A187161

Adjacent sequences:  A260099 A260100 A260101 * A260103 A260104 A260105

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 16 2015

STATUS

approved

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Last modified January 19 22:12 EST 2022. Contains 350466 sequences. (Running on oeis4.)