121441

Properties

Appears in sequences

• Number of intersections of diagonals in the interior of a regular n-gon.at n=43A006561
• a(n) = Sum_{d|n} A000010(n/d) * A000045(d-1).at n=26A113166
• Primes p such that p^2 + 6, p^2 + 12 and p^2 + 18 are all prime.at n=21A173627
• Primes expressible as concatenation of reversals of two consecutive squares, in order of their occurrence (ignoring leading zeros).at n=1A228134
• Prime numbersat n=11429