Number of polyominoes with width and height equal to 2n that are invariant under all symmetries of the square.

A268758

Number of polyominoes with width and height equal to 2n that are invariant under all symmetries of the square.

Terms

    a(0) =1a(1) =3a(2) =17a(3) =163a(4) =2753a(5) =84731a(6) =4879497a(7) =535376723a(8) =112921823249

External references