17522596

Appears in sequences

• Squares of even hexagonal numbers.at n=22A014772
• Let S(m, n):=Sum_{k=1..n} k^m; we define a(1):=S(1, 1), a(2):=S(2, S(1, 2)) etc., a(n):=S(n, S(n-1, S(n-2, ...S(1, n)...))).at n=3A113776