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A027923 a(n) = least k such that E{1,2,...,k} >= 1^2 + 2^2 + ... + n^2, where E = 2nd elementary symmetric function. 0
1, 2, 3, 3, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 23, 23, 24, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 27, 28, 28, 28, 29 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
min{k: A000914(k) >= A000330(n)}. - R. J. Mathar, Oct 31 2011
CROSSREFS
Sequence in context: A119466 A100922 A047785 * A167743 A020888 A196393
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified May 24 13:22 EDT 2024. Contains 372773 sequences. (Running on oeis4.)