131145

Appears in sequences

• Number of reversible string structures with n beads using exactly three different colors.at n=12A056327
• Number of primitive (aperiodic) reversible string structures with n beads using exactly three different colors.at n=12A056337
• Row sums of triangle A130585.at n=14A130586
• Irregular triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k isolated fixed points.at n=43A184178
• Solutions k of the equation cototient(k) = cototient(k-1) + cototient(k-2) where cototient(k) is A051953.at n=8A332972