A219227 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A219227

a(n) is the sum of n addends nested as follows: floor(f(floor(f(...(n)...)))) where f(x) = x^(1/3).

1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Its complement is 8, 28, 66, 128, 220, 348, 518, 519, 737, 1009, 1341, 1739, 2209, 2757, 3389, 4111, 4929, ..., .

LINKS

Table of n, a(n) for n=1..70.

EXAMPLE

For n=8, floor(8^(1/3))=2, and floor(floor(8^(1/3))^(1/3))=1 as do the remaining six terms, so a(8) = 2 + 7*1 = 9.

MATHEMATICA

a[n_] := Plus @@ Rest@ NestList[ Floor[#^(1/3)] &, n, n]; Array[a, 60]

CROSSREFS

Cf. A181092.

Sequence in context: A004727 A102352 A248182 * A007412 A270420 A336592

Adjacent sequences: A219224 A219225 A219226 * A219228 A219229 A219230

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Nov 15 2012

STATUS

approved

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.