Number of n X n symmetric binary matrices with each 1 adjacent to exactly 1 king-move neighboring 1.
A191222
Number of n X n symmetric binary matrices with each 1 adjacent to exactly 1 king-move neighboring 1.
Terms
- a(0) =1a(1) =3a(2) =5a(3) =17a(4) =107a(5) =598a(6) =5688a(7) =77906a(8) =1352347a(9) =34249359a(10) =1204670396a(11) =58155968015
External references
- oeis: A191222