251189

Appears in sequences

• Powers of fifth root of 10 rounded to nearest integer.at n=27A018142
• Powers of fifth root of 10 rounded up.at n=27A018143
• Numbers n such that n = concatenate(a, b) and sigma(a) + sigma(b) = sigma(n) - n.at n=12A239562
• a(n) = hypergeom([1/2 - n/2, -n/2], [-n], -56).at n=9A350468
• Number of vertices formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square.at n=20A355839