76881

Appears in sequences

• Number of polyominoes with n cells that tile the plane isohedrally but not by translation or by 180-degree rotation (Conway criterion).at n=15A075204
• Determinant of M(n), the n X n matrix defined by m(i,i) = 1, m(i,j) = i-j.at n=31A079034
• a(n) = 80*n^2 + 1.at n=31A158776