Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.
A146045
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =17a(5) =49a(6) =267a(7) =1635a(8) =15439a(9) =178481a(10) =2706563a(11) =52897007a(12) =1344799359a(13) =42695435337
External references
- oeis: A146045