82389

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3) with a(0) = 1, a(1) = a(2) = 2.at n=19A214727
• Numbers n such that A003144(n) = floor(alpha*n) + 1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=12A275158
• Number of distinct lines passing through exactly two points in a triangular grid of side n.at n=36A362014