37373

Appears in sequences

• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=19A033856
• Period of 1/n in sequence A033938.at n=12A033939
• Exp(n) is closer to an integer than any previous exp(k) for 1 <= k < n.at n=14A079490
• Numbers containing only digits 3 or 7 in decimal representation.at n=40A143967
• Minimal exponents m such that the fractional part of e^m obtains a minimum (when starting with m=1).at n=16A153701
• Numbers k such that the fractional part of e^k is less than 1/k.at n=7A153702
• Numbers such that all the substrings of length <= 2 are primes.at n=17A211681
• Consider a decimal number of k>=2 digits x = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + … + d_(2)*10 + d_(1) and the transform T(x)-> (d_(k)+d_(k-1) mod 10)*10^(k-1) + (d_(k-1)+d_(k-2) mod 10)*10^(k-2) + … + (d_(2)+d_(1) mod 10)*10 + (d_(1)+d(k) mod 10). Sequence lists the numbers x such that T(x)=0.at n=29A243994
• Square roots of highly composite numbers, floored down: a(n) = A000196(A002182(n)).at n=67A263096
• List of numbers k whose consecutive digits increase or decrease by d-1, where d is the number of digits in k.at n=87A292439
• Positive numbers k such that -k, -(k + 1), -(k + 2), and -(k + 3) are 4 consecutive negative negabinary-Niven numbers (A331728).at n=16A331825