Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation.
A147186
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =7a(7) =9a(8) =31a(9) =55a(10) =787a(11) =1573a(12) =22701a(13) =53447a(14) =1146545a(15) =3177491a(16) =131825683a(17) =433244499a(18) =34337767649a(19) =134703759045
External references
- oeis: A147186