90331

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 87 ones.at n=5A031855
• Number of mobiles (circular rooted trees) with n nodes and 3 leaves.at n=43A055341
• Sum of the prime numbers in, but not on the border of, an n X n square array whose elements are the numbers from 1..n^2, listed in increasing order by rows.at n=33A344847