Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.
A146194
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =13a(7) =33a(8) =61a(9) =131a(10) =505a(11) =1541a(12) =6387a(13) =29305a(14) =198459a(15) =1139657a(16) =7455433a(17) =47764793a(18) =415936701a(19) =3457440839a(20) =39284046163a(21) =428565300485
External references
- oeis: A146194