Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10000-11111-00001 pattern in any orientation.
A147070
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10000-11111-00001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =9a(8) =19a(9) =61a(10) =211a(11) =741a(12) =3813a(13) =22505a(14) =147447a(15) =1175399a(16) =10583799a(17) =109540847a(18) =1364336983a(19) =19785643957a(20) =336137809321
External references
- oeis: A147070