277344

Appears in sequences

• Triangle read by rows: T(n,k) is the number of polygons with 2*n sides, of which k run through the center of a circle, on the circumference of which the 2*n vertices of the polygon are arranged at equal spacing, up to rotation and reflection.at n=33A358329
• Sum of the divisors of 3^n-1.at n=10A366576