33557

Appears in sequences

• Number of polyominoes with n cells, symmetric about diagonal 2.at n=42A056878
• Coefficients of the nonnegative powers of rho(11) = 2*cos(Pi/11) when written in the power basis of the degree 5 number field Q(rho(11)). Negative of the coefficients of the first power.at n=19A231183
• Number of interior vertices formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) square grid.at n=19A331767
• Number of polyominoes of n cells with both diagonal symmetries, for which the 180-degree rotational symmetry has an axis that coincides with the center of a square, but without 90-degree rotational symmetry.at n=42A351159
• Numbers with multiplicative digital root of 5 that are free of 1s and have their digits in ascending order.at n=11A371561