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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A059592 Square-full part of n^2+1. 9
1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 17, 1, 1, 29, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 13, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

a(n)=A000188[n^2+1], A059591[n]*a(n)^2 = n^2+1 Related to period-1 continued fractions [z,z,z,...]

A124808 gives number of numbers m<=n with a(m)=1. - Reinhard Zumkeller, Nov 08

LINKS

R. Zumkeller, Table of n, a(n) for n = 0..1000

EXAMPLE

a(7)=5 since 7^2+1 = 50 = 25*2 = (5^2)*2

CROSSREFS

A000188, A059591, A007913.

Cf. A002522.

Sequence in context: A146306 A257098 A119788 * A098087 A257099 A291578

Adjacent sequences:  A059589 A059590 A059591 * A059593 A059594 A059595

KEYWORD

easy,nonn

AUTHOR

Marc LeBrun, Jan 25 2001

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 September 21 15:13 EDT 2017. Contains 292300 sequences.