56134

Appears in sequences

• Triangle of Stirling numbers of order 6.at n=17A059025
• Numbers k such that usigma(k) = phi(k)*omega(k), where omega(k) is the number of distinct prime divisors of k.at n=24A063795
• Numbers k such that sigma(k) = bigomega(k) * phi(k).at n=20A067238
• Numbers k such that sigma(k) = 4*phi(k).at n=19A068390
• Numbers k such that sigma(k) = phi(k*bigomega(k)).at n=20A068400
• Numbers k such that sigma(k) = phi(k)*omega(k).at n=14A073567
• Triangle T(n,k) = Sum_{i=1..n} 2^(i-1)*C(n+2*k-i-1, k-1), 1 <= k <= n.at n=20A185139
• p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - S^5.at n=34A291724
• Integers n such that sigma(n)/phi(n) is a perfect square.at n=36A293391
• Consecutive internal states of the linear congruential pseudo-random number generator (321*s + 123) mod 10^5 when started at 1.at n=31A383128