42519

Appears in sequences

• Add 1, multiply by 1, add 2, multiply by 2, etc., start with 3.at n=15A019462
• G.f. satisfies: A(x) = Sum_{n>=0} (1 - (1 - x*A(x))^n)^n.at n=6A187827
• Number of 0..2 arrays x(0..n-1) of n elements with zero n-1st difference.at n=17A200148
• The number of regions formed inside an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices.at n=20A332953