login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071591 Numbers m such that Reversal(m) is squarefree. 0
1, 2, 3, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 22, 24, 26, 28, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 47, 49, 50, 51, 53, 55, 56, 58, 59, 60, 62, 64, 66, 68, 70, 71, 73, 74, 75, 76, 77, 78, 79, 83, 85, 87, 91, 92, 93, 95, 96, 97, 98, 100, 101, 102, 103, 104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..69.

MATHEMATICA

Select[Range[150], SquareFreeQ[FromDigits[Reverse[IntegerDigits[#]]]]&]  (* Harvey P. Dale, Feb 23 2011 *)

PROG

(PARI) isok(n) = issquarefree(fromdigits(Vecrev(digits(n)))); \\ Michel Marcus, Jan 16 2018

CROSSREFS

Cf. A004086, A005117.

Sequence in context: A030161 A129125 A259444 * A089105 A028769 A094784

Adjacent sequences:  A071588 A071589 A071590 * A071592 A071593 A071594

KEYWORD

base,easy,nonn

AUTHOR

Benoit Cloitre, Jun 01 2002

EXTENSIONS

Corrected (by deleting duplicate term) by Harvey P. Dale, Feb 23 2011

Missing term 1 inserted by Michel Marcus, Jan 16 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 January 18 05:18 EST 2021. Contains 340250 sequences. (Running on oeis4.)