235636

Appears in sequences

• G.f.: Product_{k>=1} (1 + 3*x^(k^2)) / (1-x^k).at n=36A280225
• a(n)/A002939(n+1) is the Kirchhoff index of the join of the disjoint union of two complete graphs on n vertices with the empty graph on n+1 vertices.at n=23A338109