Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
A147447
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01100-00110-00011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =13a(8) =39a(9) =123a(10) =461a(11) =2371a(12) =13249a(13) =80863a(14) =611487a(15) =5648891a(16) =61162833a(17) =795442861a(18) =12190308735a(19) =215424452659
External references
- oeis: A147447