57327

Appears in sequences

• a(1) = 3, a(n + 1) = 1 + a(n) + least odd prime factor of a(n).at n=34A144751
• Number of zero-sum -n..n arrays of 4 elements with adjacent element differences also in -n..n.at n=30A202254
• a(0) = 0. a(n) is the number of repeating sums in the collection of all sums of any k elements in [a(0), ... a(n-1)] chosen without replacement for 2 <= k <= n.at n=16A247188
• Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*...*(1-x^6)).at n=45A288341