180770

Appears in sequences

• Number of n X 2 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing.at n=20A202027
• Trajectory of 262 under repeated application of the permutation A264965: a(0) = 262; for n >= 1, a(n) = A264965(a(n-1)).at n=27A264972
• Numbers that are the sum of six fourth powers in nine or more ways.at n=18A345566
• Numbers that are the sum of six fourth powers in exactly nine ways.at n=13A345821