login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A035124 Nonpalindromic cubes remaining cubic which written backwards: take the cube root of n, reverse its digits, cube that and the result is n with its digits reversed. 4
1033364331, 1334633301, 1003303631331, 1331363033001, 1000330036301331, 1003033061330301, 1003333697667631, 1030331603303001, 1030637669664331, 1331036300330001, 1334669667360301, 1367667963333001, 1000033000363001331, 1000303030604030301, 1000333036964367631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Cubes with trailing zeros are excluded.

LINKS

Table of n, a(n) for n=1..15.

P. De Geest, Palindromic Cubes

Eric Weisstein's World of Mathematics, Cubic Number

Index entry for sequences related to reversing digits of squares

EXAMPLE

E.g., 1011^3 = 1033364331 -> 1334633301 = 1101^3.

1003333697667631 is included because its cube root, 100111, when reversed (i.e., 111001) and cubed yields 1367667963333001.

PROG

(PARI) isok(n) = {if (ispower(n, 3, &k), dn = digits(n); if (Vecrev(dn) != dn, dk = Vecrev(digits(k)); rk = subst(Pol(dk, x), x, 10); digits(rk^3) == Vecrev(dn); ); ); } \\ Michel Marcus, Oct 04 2015

CROSSREFS

Cf. A035090, A035125, A064021, A319389.

Sequence in context: A036745 A225218 A268312 * A197952 A321066 A222531

Adjacent sequences:  A035121 A035122 A035123 * A035125 A035126 A035127

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 15 1998

EXTENSIONS

More terms from Seiichi Manyama, Sep 18 2018

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 13 12:37 EST 2019. Contains 329968 sequences. (Running on oeis4.)