501696

Appears in sequences

• Product of order of cycles of the permutation created by duality and reversal on the partitions of n.at n=15A036047
• Total number of split graphs (chordal + chordal complement) on n vertices.at n=11A048194
• a(n) = (n^7 - 21*n^3 + 20*n)/210.at n=14A239095