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A181241 Number of nX6 binary matrices with no 2X2 circuit having pattern 0101 in any orientation 1
64, 2258, 85126, 3185462, 119310334, 4468252414, 167341334542, 6267120468434, 234710735573170, 8790181730741270, 329202219837957230, 12328994417789802954, 461734746019197769254, 17292486998904958867138 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A181245

LINKS

R. H. Hardin, Table of n, a(n) for n=1..200

FORMULA

Empirical: a(n)=36*a(n-1)+120*a(n-2)-2391*a(n-3)-3905*a(n-4)+50702*a(n-5)+27152*a(n-6)-396016*a(n-7)+154999*a(n-8)+751787*a(n-9)-499260*a(n-10)-410368*a(n-11)+355981*a(n-12)+38077*a(n-13)-70276*a(n-14)+6203*a(n-15)+3386*a(n-16)-622*a(n-17)+28*a(n-18)

CROSSREFS

Sequence in context: A183432 A017211 A221424 * A053107 A330820 A000812

Adjacent sequences:  A181238 A181239 A181240 * A181242 A181243 A181244

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2010

STATUS

approved

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Last modified December 5 03:59 EST 2021. Contains 349530 sequences. (Running on oeis4.)