51468

Appears in sequences

• Trajectory of 3 under map n->37n+1 if n odd, n->n/2 if n even.at n=17A037116
• Triangle of numbers, called Y(1,2), related to generalized Catalan numbers A062992(n) = C(2;n+1) = A064062(n+1).at n=33A115195
• Number of line graphs on n unlabeled nodes.at n=11A132220