5000500
domain: N
Appears in sequences
- a(n) = A069537(n)/2.at n=24A088404
- Numbers k such that k and k^2 use only the digits 0, 2 and 5.at n=21A136910
- Numbers k such that k and k^2 use only the digits 0, 2, 5 and 7.at n=28A136915
- Numbers k such that k and k^2 use only the digits 0, 2, 5 and 8.at n=31A136918
- Numbers k such that k and k^2 use only the digits 0, 2, 5 and 9.at n=48A136920
- a(n) = n^3*(n^4 + 1)/2.at n=10A168179
- Numbers k such that sigma(k) = psi(k) + phi(k) + tau(k)^2.at n=28A390421