261072

Appears in sequences

• Number of primitive (aperiodic) palindromes using a maximum of four different symbols.at n=17A056460
• Number of connected 7-colorable (i.e., chromatic number <= 7) simple graphs on n nodes.at n=8A076326
• Number of non-Wiener index-unique simple connected graphs on n nodes.at n=8A193217
• Ordered areas of primitive integer Soddyian triangles.at n=9A210484
• Table read by rows: T(n,k) = the number of regions with k sides, k >= 3, in a Farey diagram of order (n,n).at n=17A358885