209549

Properties

Appears in sequences

• Number of arrays of -1..1 integers x(1..n) with every x(i) in a subsequence of length 1, 2 or 3 with sum zero.at n=13A193695
• Number of length n+6 0..1 arrays with at most one downstep in every 6 consecutive neighbor pairs.at n=17A255990
• Prime numbersat n=18766