Number of n X n symmetric binary matrices with each 1 adjacent to no more than 3 king-move neighboring 1s.
A191479
Number of n X n symmetric binary matrices with each 1 adjacent to no more than 3 king-move neighboring 1s.
Terms
- a(0) =2a(1) =8a(2) =42a(3) =445a(4) =8336a(5) =273578a(6) =16060725a(7) =1663317205a(8) =304789975903
External references
- oeis: A191479