474548

Appears in sequences

• Numbers k such that sigma(k) = 4*phi(k).at n=32A068390
• Numbers k such that sigma(k) = phi(k*bigomega(k)).at n=36A068400
• Numbers k such that sigma(k) = phi(k)*omega(k).at n=23A073567
• Number of binary strings of length n with no substrings equal to 0011 or 0101.at n=27A164406