A027922 Least k such that 1+2+...+k >= 1^2 + 2^2 + ... + n^2.

1, 3, 5, 8, 10, 13, 17, 20, 24, 28, 32, 36, 40, 45, 50, 55, 60, 65, 70, 76, 81, 87, 93, 99, 105, 111, 118, 124, 131, 138, 144, 151, 158, 165, 173, 180, 187, 195, 203, 210, 218, 226, 234, 242, 251, 259, 267, 276, 284, 293, 302, 311, 319

Offset

1,2

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Table[Ceiling[1/6 (-3+Sqrt[9+12n(1+n)(1+2n)])], {n, 60}] (* Harvey P. Dale, Oct 06 2020 *)

Crossrefs

Sequence in context: A072150 A288575 A091309 * A097911 A051611 A258028

Adjacent sequences: A027919 A027920 A027921 * A027923 A027924 A027925

Keyword

nonn

Author

Clark Kimberling

Status

approved