143430

Appears in sequences

• a(n) = n*(n+1)*(20*n-17)/6.at n=35A172117
• a(n) = number of permutations of (1,2,...,n) producible by an ordered triple of distinct transpositions.at n=12A253171
• Number of unlabeled graphs on n vertices without 4-cycles or 5-cycles.at n=12A366220