Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
A147038
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =9a(6) =21a(7) =69a(8) =305a(9) =1333a(10) =6087a(11) =37147a(12) =280959a(13) =2501123a(14) =26363255a(15) =322801403a(16) =4679667007a(17) =81403804671
External references
- oeis: A147038