83804

Appears in sequences

• Integer part of Gauss's Arithmetic-Geometric Mean M(2,n^5).at n=14A127766
• a(n) = n*(n + 1)*(7*n + 5)/6.at n=41A304993
• Triangle read by rows: T(n,k) is the number of k-element equivalence classes of closed meanders with 2n points.at n=33A339460