62499

Appears in sequences

• Numbers k such that phi(k) | sigma_10(k).at n=27A015768
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=16A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=17A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=18A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=19A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=20A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=21A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=22A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=23A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=24A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=25A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=26A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=27A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=28A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=29A039935
• Smallest k for which k, 2k, ... nk all contain the digit 4.at n=30A039935
• Product of two consecutive odd numbers k, k+2 such that (k*(k+2))+-2 are primes.at n=10A174383
• Numbers of the form i*5^j-1 (i=1..4, j >= 0).at n=27A181287
• Numbers which contain only the digit 4 in their base-5 representation, with at most one exception. If the exception is the most-significant digit, it must be the digit 1, 2, or 3, otherwise the exception must be the digit 3.at n=41A188531
• a(n) = 4*5^n-1.at n=6A198763