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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071557 Numbers n such that A065876(n)=n^2-n+1. 2
2, 3, 4, 5, 6, 7, 9, 10, 11, 14, 15, 16, 19, 20, 24, 25, 26, 29, 35, 36, 39, 40, 41, 45, 49, 51, 54, 56, 59, 61, 65, 66, 69, 71, 74, 79, 84, 85, 90, 94, 95, 101, 110, 116, 120, 121, 124, 126, 130, 131, 134, 139, 141, 145, 146, 150, 156, 159, 160, 165, 169, 170, 171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..63.

PROG

(PARI) for(n=1, 300, q=n+1; while((q^2+1)%(n^2+1)>0, q++); if(q==n^2-n+1, print1(n, ", ")))

CROSSREFS

Cf. A065876.

Sequence in context: A174328 A272570 A123101 * A271108 A179401 A117729

Adjacent sequences:  A071554 A071555 A071556 * A071558 A071559 A071560

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, May 30 2002

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 February 21 06:40 EST 2019. Contains 320371 sequences. (Running on oeis4.)