257725

Appears in sequences

• Numbers that are the sum of 2 nonzero squares in exactly 9 ways.at n=11A025292
• Numbers that are the sum of 2 nonzero squares in 9 or more ways.at n=16A025300
• Numbers that are the sum of 2 distinct nonzero squares in exactly 9 ways.at n=11A025310
• Numbers that are the sum of 2 distinct nonzero squares in 9 or more ways.at n=16A025319
• Numbers k that are the hypotenuse of exactly 37 distinct integer-sided right triangles, i.e., k^2 can be written as a sum of two squares in 37 ways.at n=12A097245
• The hyper-Wiener index of the straight pentachain of n pentagonal rings (see Fig. 2.1 in the A. A. Ali et al. reference).at n=24A224460
• Numbers k for which A053585(sigma(k)) is equal to A053585(k) and that satisfy also Euler's condition for odd perfect numbers (A228058).at n=4A388276