770133

Appears in sequences

• Octagonal numbers for which both the sum and the product of the digits is also an octagonal number.at n=23A117084
• Odd octagonal numbers indexed by triangular numbers.at n=22A243201
• Unique solution x of the congruence x^2 = -1 (mod m(n)), with m(n) = A002559(n) (Markoff numbers) in the interval [1, floor(m(n)/2)], assuming the Markoff uniqueness conjecture, for n >= 3.at n=43A324601
• Characteristic numbers of Markov triples in the binary tree A368546.at n=38A368134