A181241 Number of nX6 binary matrices with no 2X2 circuit having pattern 0101 in any orientation

64, 2258, 85126, 3185462, 119310334, 4468252414, 167341334542, 6267120468434, 234710735573170, 8790181730741270, 329202219837957230, 12328994417789802954, 461734746019197769254, 17292486998904958867138

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