35074

Appears in sequences

• a(n) = floor( n*(n-1)*(n-2)*(n-3)/28 ).at n=33A011938
• Numerators of continued fraction convergents to sqrt(674).at n=5A042296
• Numbers k such that usigma(k) = phi(k)*omega(k), where omega(k) is the number of distinct prime divisors of k.at n=20A063795
• Numbers n such that the arithmetic, geometric and harmonic means of phi(n) and sigma(n) are all integers.at n=18A065146
• Numbers k such that sigma(k) = bigomega(k) * phi(k).at n=16A067238
• Numbers k such that sigma(k) = 4*phi(k).at n=14A068390
• Numbers k such that sigma(k) = phi(k*bigomega(k)).at n=15A068400
• Numbers k such that sigma(k) = phi(k)*omega(k).at n=9A073567
• Squarefree balanced numbers (i.e., squarefree members of A020492).at n=45A078557
• Number of 8k+7 primes (A007522) in range ]2^n,2^(n+1)].at n=20A095012
• Numbers n such that sigma(2*phi(n)) = 2*sigma(n).at n=18A137733
• Numbers n = p * q, where n, p, and q together contain all 10 digits at least once.at n=34A253172
• Integers m of the form m = 3*p + 5*q = 5*r + 7*s where {p,q} and {r,s} are pairs of consecutive primes.at n=13A283392
• Integers n such that sigma(n)/phi(n) is a perfect square.at n=28A293391
• Products k of 4 distinct primes (or tetraprimes) such that none of k-2, k-1, k+1 and k+2 is squarefree.at n=21A364766