70672

Appears in sequences

• Number of length 2+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third.at n=15A248463
• Number of polygons formed when every pair of vertices of a row of n adjacent congruent rectangles are joined by an infinite line.at n=21A344993
• Accumulation triangle of A360603 read by rows.at n=33A360860
• Expansion of e.g.f. 1 / (1 - x^2 * (exp(x) - 1))^2.at n=8A375662
• Expansion of 1/sqrt(1 - 4*x/sqrt(1 - 4*x)).at n=7A377237