The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A018036 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A018036

Powers of cube root of 21 rounded down.
(history; published version)

#11 by Charles R Greathouse IV at Thu Sep 08 08:44:44 EDT 2022

PROG

(MAGMAMagma) [Floor(21^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Discussion

Thu Sep 08

08:44

OEIS Server: https://oeis.org/edit/global/2944

#10 by Jon E. Schoenfield at Mon Dec 27 21:14:48 EST 2021

STATUS

editing

approved

#9 by Jon E. Schoenfield at Mon Dec 27 21:14:46 EST 2021

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing

#8 by Michel Marcus at Mon Jan 06 09:51:20 EST 2014

STATUS

reviewed

approved

#7 by Joerg Arndt at Mon Jan 06 09:20:19 EST 2014

STATUS

proposed

reviewed

#6 by Vincenzo Librandi at Mon Jan 06 09:14:31 EST 2014

STATUS

editing

proposed

#5 by Vincenzo Librandi at Mon Jan 06 09:14:15 EST 2014

DATA

1, 2, 7, 21, 57, 159, 441, 1216, 3356, 9261, 25550, 70491, 194481, 536558, 1480323, 4084101, 11267724, 31086798, 85766121, 236622224, 652822776, 1801088541, 4969066719, 13709278306, 37822859361, 104350401110, 287894844440, 794280046581, 2191358423329

LINKS

Vincenzo Librandi, <a href="/A018036/b018036.txt">Table of n, a(n) for n = 0..200</a>

MATHEMATICA

Table[Floor[21^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)

PROG

(MAGMA) [Floor(21^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

CROSSREFS

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), this sequence (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

EXTENSIONS

More terms from Vincenzo Librandi, Jan 06 2014

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 16:46:23 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:46

OEIS Server: https://oeis.org/edit/global/110

#3 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

#2 by N. J. A. Sloane at Sun Jun 14 03:00:00 EDT 1998

REFERENCES

KEYWORD

nonn,new

nonn

AUTHOR

njas [Possible errors corrected Aug 16 1996]

njas