A027917 a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function.

3, 10, 21, 38, 63, 95, 137, 191, 256, 334, 427, 535, 661, 805, 968, 1151, 1357, 1585, 1838, 2117, 2422, 2755, 3117, 3510, 3934, 4392, 4883, 5409, 5973, 6574, 7213, 7894, 8615, 9379, 10187, 11041, 11940, 12887, 13883, 14929, 16026, 17176, 18379, 19637, 20952, 22323, 23754, 25244, 26795, 28408

Offset

3,1

Links

Table of n, a(n) for n=3..52.

Formula

a(n) = min{k: A000217(k) >= A001303(n-2)}. - R. J. Mathar, Sep 23 2016

Crossrefs

Sequence in context: A354329 A374496 A146012 * A038347 A338089 A294365

Adjacent sequences: A027914 A027915 A027916 * A027918 A027919 A027920

Keyword

nonn

Author

Clark Kimberling

Status

approved