29971

Appears in sequences

• Numbers n such that n through n+5 have the same number of distinct prime factors.at n=34A045934
• Numbers k such that sigma(k+1) = 2*phi(k).at n=15A067260
• Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11.at n=38A254950
• Number of integer partitions of n whose parts minus 1 are relatively prime.at n=39A328170
• Numbers that are the sum of seven fourth powers in seven or more ways.at n=36A345573
• Numbers that are the sum of seven fourth powers in exactly seven ways.at n=27A345829
• 11-gonal numbers which are products of three distinct primes.at n=20A354446
• a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} phi(i*j*k) / phi(k).at n=10A372662