A354454 Nearest integer to sqrt(8*Pi*n).

0, 5, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 22, 23, 24, 24, 25, 25, 26, 26, 27, 27, 27, 28, 28, 29, 29, 30, 30, 30, 31, 31, 32, 32, 32, 33, 33, 34, 34, 34, 35, 35, 35, 36, 36, 36, 37, 37, 38, 38, 38, 39, 39, 39, 39, 40, 40, 40

Offset

0,2

Links

Table of n, a(n) for n=0..65.

Formula

a(n) = floor(sqrt(8*Pi*n) + 1/2).

Mathematica

Table[Floor[Sqrt[8*Pi*n] + 1/2, 1], {n, 0, 65}]

Crossrefs

Cf. A000194.

Sequence in context: A164029 A364681 A143730 * A194394 A160811 A116451

Adjacent sequences: A354451 A354452 A354453 * A354455 A354456 A354457

Keyword

nonn

Author

Mats Granvik, May 30 2022

Status

approved