41210

Appears in sequences

• a(n) = 81*n^2 - 72*n + 17.at n=23A154277
• Numbers k such that distances from k to three nearest squares are three triangular numbers.at n=25A232501
• Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1 and gcd(j,k) = 1.at n=25A300166
• Products k of 4 distinct primes (or tetraprimes) such that none of k-2, k-1, k+1 and k+2 is squarefree.at n=27A364766