136290

Appears in sequences

• Numbers n such that sigma(n) = phi(prime(n)+1).at n=29A067625
• Number of subsets of {1,2,...,n-12} without differences equal to 2, 4, 6, 8, 10 or 12.at n=59A224813
• a(n) = n*(n + 1)*(19*n - 16)/6.at n=35A237618
• Numbers k such that usigma(k) >= 3*k, where usigma(k) = sum of unitary divisors of k (A034448).at n=24A285615
• Products of 6 distinct primes that are sandwiched between semiprime numbers.at n=12A378627
• Squarefree 3-abundant numbers: squarefree numbers k such that A000203(k) > 3*k.at n=24A387153