Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
A146913
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =5a(6) =5a(7) =13a(8) =21a(9) =65a(10) =79a(11) =331a(12) =533a(13) =2619a(14) =5227a(15) =28001a(16) =61339a(17) =390903a(18) =1035837a(19) =7813633a(20) =23994329a(21) =210020947a(22) =748949341a(23) =7662897803a(24) =32193163805a(25) =385464587673
External references
- oeis: A146913