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

Author

R. H. Hardin Oct 10 2010

Keywords

• nonn

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)