135156

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NES = NU-87 H4[Al4Si64O136].nH2O starting with a T7 atom.at n=15A019208
• Number of series-reduced dyslexic planted planar trees with n leaves.at n=11A032132
• Regular triangle where T(n,k) is the number of labeled connected multigraphs with loops with n edges and k vertices.at n=33A322148
• Place n equally spaced points around the circumference of a circle and then, for each pair of points, draw two distinct circles, whose radii are the same as the first circle, such that both points lie on their circumferences. The sequence gives the total number of (curved) edges formed.at n=27A371375