Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0111-0100 pattern in any orientation.
A146465
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =19a(10) =33a(11) =77a(12) =255a(13) =1039a(14) =4359a(15) =18069a(16) =81085a(17) =437915a(18) =2749579a(19) =20046895a(20) =155332489a(21) =1345844489a(22) =12832415197a(23) =142867250585
External references
- oeis: A146465