21526641

Appears in sequences

• Bending a piece of wire of length n+1 (configurations that can only be brought into coincidence by turning the figure over are counted as different).at n=16A001444
• a(n) = 3^n*(3^n + 1)/2.at n=8A025551
• Number of reversible strings with n beads of 3 colors.at n=16A032120
• a(n) = (n^8 + n^4)/2.at n=9A071231
• a(n) = n^8*(n^8 + 1)/2.at n=3A170780
• Number of classes of endofunctions of [n] under vertical translation mod n and reversal.at n=9A275551
• Number of inequivalent height 1 degree n polynomials with nonzero constant term.at n=16A323845