499997

Appears in sequences

• Numbers k such that sigma(k) plus the k-th prime gives a fourth power.at n=2A114083
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 9.at n=51A136907
• Number of (n+3) X 8 0..1 matrices with each 4 X 4 subblock idempotent.at n=25A224565
• Numbers k in base 10 such that the digits of 2 + k are the digits of 2k written in reverse order.at n=5A276509
• Numbers j such that there exists a number i <= j with the property that i+j and i*j have the same decimal digits in reverse order.at n=7A360518