a(n) is the number of d+/d- diagonally convex polyplets (polyominoes which need only touch at corners) with n cells.
A319321
a(n) is the number of d+/d- diagonally convex polyplets (polyominoes which need only touch at corners) with n cells.
Terms
- a(0) =1a(1) =4a(2) =20a(3) =108a(4) =600a(5) =3368a(6) =18968a(7) =106906a(8) =602532a(9) =3395402a(10) =19131460a(11) =107788900a(12) =607274848
External references
- oeis: A319321