a(n) is the number of free 'polyominoes' on the (4.8.8) grid with n octagons and n squares.
A057707
a(n) is the number of free 'polyominoes' on the (4.8.8) grid with n octagons and n squares.
Terms
- a(0) =1a(1) =8a(2) =80a(3) =1296a(4) =22601a(5) =426305a(6) =8340302a(7) =167925635a(8) =3453618607
External references
- oeis: A057707