A027925 a(n) = least k such that E{1,2,...,k} >= 1^3 + 2^3 + ... + n^3, where E = 2nd elementary symmetric function.

1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 74, 75

Offset

1,2

Links

Table of n, a(n) for n=1..63.

Formula

min{k : A000914(k) >= A000537(n)}. - R. J. Mathar, Oct 31 2011

Crossrefs

Sequence in context: A047318 A057904 A188397 * A247419 A039245 A039188

Adjacent sequences: A027922 A027923 A027924 * A027926 A027927 A027928

Keyword

nonn

Author

Clark Kimberling

Extensions

Offset corrected by R. J. Mathar, Oct 31 2011

Status

approved