152139002500
domain: N
Appears in sequences
- Consider the sequence of circles C0, C1, C2, C3 ..., where C0 is a half-circle of radius 1. C1 is the largest circle that fits into C0 and has radius 1/2. C(n+1) is the largest circle that fits inside C0 but outside C(n), etc. Sequence gives the curvatures (reciprocals of the radii) of the circles.at n=15A099938
- Perfect squares (A000290) that can be expressed as the sum of four consecutive triangular numbers (A000217).at n=7A165518
- Twice A024537.at n=29A182780