316250

Appears in sequences

• a(n) = (n+1)*binomial(n+1,4).at n=21A027764
• Numbers n such that n^2 can be split into two nonzero squares (perhaps with leading zeros) in exactly two different ways.at n=22A054737
• Numbers n such that n^2 + 1, n^2 + 3, n^2 + 7 and n^2 + 9 are all primes.at n=18A057015
• Largest k > 1 such that (sum of digits of k^n)*(sum of digits of k^(n+1)) = k, or 0 if no such k exists.at n=27A130181