91070

Appears in sequences

• a(n) = 2nd elementary symmetric function of the first n+1 odd positive integers.at n=19A024196
• Ooguri-Vafa invariants of disk domain wall degeneracies for brane I in the O(K) -> P^1 X P^1 geometry.at n=4A061606
• Number of connected regular graphs with n nodes and girth at least 5.at n=22A186725
• a(n) = Sum_{k = n..2*n+1} k^2.at n=33A299646