A328801 Least k such that there exists a square of side length sqrt(A001481(n)) with vertices in a k X k square array of points.
2, 3, 3, 4, 5, 4, 5, 6, 5, 6, 7, 7, 6, 7, 8, 9, 9, 7, 8, 9, 10, 10, 8, 9, 11, 10, 11, 12, 9, 10, 11, 13, 12, 13, 13, 10, 11, 12, 14, 13, 14, 15, 11, 12, 13, 15, 14, 16, 15, 16, 12, 13, 14, 17, 15, 17, 16, 13, 14, 17, 15, 18, 16, 18, 17, 19, 19, 14, 15, 16, 17
Offset: 2
Examples
For n = 8, there is a square with side length sqrt(A001481(8)) = sqrt(10) and vertices in the a(8) X a(8) = 5 X 5 square array of points. o o o * o * o o o o o o o o o o o o o * o * o o o However, there is no square with side length sqrt(10) and vertices in a smaller square array points.
Links
- Peter Kagey, Table of n, a(n) for n = 2..10000
Formula
a(n) = A328803(n) + 1.