1126380

Appears in sequences

• Numbers k such that 2^k - 3 is prime.at n=61A050414
• a(n) is the smallest number m such that sigma(m)=n*pi(m), or 0 if no such m exists.at n=34A137602
• Number of permutations of floor(i*7/6), i=0..n-1, with all sums of two and three adjacent terms respectively unique.at n=10A147896