Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having determinant equal to one.
A227747
Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having determinant equal to one.
Terms
- a(0) =4a(1) =13a(2) =40a(3) =129a(4) =409a(5) =1300a(6) =4137a(7) =13152a(8) =41825a(9) =133009a(10) =422964a(11) =1345045a(12) =4277288a(13) =13601889a(14) =43254441a(15) =137550436a(16) =437414545a(17) =1390991616a(18) =4423395649a(19) =14066532769a(20) =44732002468a(21) =142249129309a(22) =452356561000
External references
- oeis: A227747