A027918 Least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 4th elementary symmetric function.

7, 23, 57, 116, 212, 356, 562, 845, 1224, 1717, 2345, 3130, 4097, 5272, 6682, 8357, 10327, 12627, 15290, 18353, 21855, 25834, 30332, 35393, 41062, 47385, 54412, 62191, 70776

Offset: 4

Author

Clark Kimberling

Keywords

• nonn

Formula

a(n) = min{k: A000217(k) >= A000915(n-3)}. - R. J. Mathar, Sep 23 2016