70920

Appears in sequences

• Number of 2-connected outerplanar graphs on n labeled nodes.at n=4A097999
• Least positive integer k such that k and k*n are terms of A259539.at n=5A259540
• Irregular triangle read by rows: T(n,k) = number of unsigned unichromosonal genomes with n genes at 3-break distance k from a fixed genome, 0 <= k <= floor(n/2).at n=34A264614