Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.
A147000
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =1a(8) =3a(9) =1a(10) =5a(11) =1a(12) =11a(13) =3a(14) =31a(15) =8a(16) =90a(17) =23a(18) =344a(19) =61a(20) =1429a(21) =183a(22) =6788a(23) =609a(24) =37364a(25) =3021a(26) =252513
External references
- oeis: A147000