Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
A147485
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =5a(9) =7a(10) =13a(11) =19a(12) =54a(13) =129a(14) =405a(15) =1014a(16) =3416a(17) =8953a(18) =35203a(19) =121647a(20) =602370a(21) =2444491a(22) =14100721a(23) =64488491a(24) =418264276a(25) =2289523483
External references
- oeis: A147485