3680776

Appears in sequences

• Octagonal numbers (A000567) that are also centered heptagonal numbers (A069099).at n=5A254857
• Cyclops octagonal numbers: a(n) = n*(3*n-2) with one "zero" digit in the middle.at n=31A285767
• The first of three consecutive octagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=13A298312