1/128 the number of (n+2) X 3 binary arrays with each 3 X 3 subblock trace equal to some horizontal or vertical neighbor 3 X 3 subblock trace.
A185985
1/128 the number of (n+2) X 3 binary arrays with each 3 X 3 subblock trace equal to some horizontal or vertical neighbor 3 X 3 subblock trace.
Terms
- a(0) =0a(1) =10a(2) =28a(3) =200a(4) =876a(5) =4838a(6) =23840a(7) =124114a(8) =628932a(9) =3229072a(10) =16473124a(11) =84299894a(12) =430743744a(13) =2202581690a(14) =11258708588a(15) =57560078392a(16) =294250374492
External references
- oeis: A185985