34122

Appears in sequences

• Number of ways to label the vertices of the octahedron (or faces of the cube) with nonnegative integers summing to n, where labelings that differ only by rotation or reflection are considered the same.at n=41A097513
• Consider the first run of composites that contains at least two numbers whose largest prime factor is prime(n), n >= 2. a(n) is the second of these numbers.at n=13A137800
• Numbers k for which there are no prime numbers in the range (k-4*sqrt(sqrt(k)), k].at n=39A192320
• Numbers k such that there is no prime p and index j < k such that A002182(k) = p * A002182(j).at n=16A272606
• Numbers n such that A083722(n) > 1 and A083722(n) occurs earlier in A083722.at n=24A293894
• a(n) = Sum_{k=0..n} (-1)^(n - k) * binomial(n, k) * binomial(n + k - 1, n - k).at n=12A350290
• Numbers k such that sigma(k) = psi(k) + tau(k)^2.at n=32A390296