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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A059870 Numbers n such that there exist no palindromic octagonal numbers of length n. 4
2, 3, 5, 6, 7, 8, 10, 11, 15, 17, 18, 20, 22, 23, 26, 31, 34 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

P. De Geest, Palindromic octagonals

CROSSREFS

Cf. A034822, A034307, A059868, A059869, A000567, A057106, A057107.

Sequence in context: A137620 A028765 A181807 * A179813 A191914 A145353

Adjacent sequences:  A059867 A059868 A059869 * A059871 A059872 A059873

KEYWORD

nonn,base,hard

AUTHOR

Patrick De Geest, Feb 15 2000

EXTENSIONS

a(13)-a(17) from World!Of Numbers link entered by Michel Marcus, Mar 04 2014

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified October 20 17:39 EDT 2017. Contains 293648 sequences.