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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A067690 gcd((2n)!+1, n!+1) when not equal to 1. 0
7, 11, 61, 19, 43, 47, 67, 79, 103, 127, 131, 163, 179, 191, 199, 227, 263, 347, 367, 383, 419, 431, 443, 479, 491, 503, 523, 563, 571, 599, 607, 619, 631, 683, 691, 727, 739, 743, 787, 823, 839, 863, 887, 947, 991, 1019, 1051, 1087, 1091, 1123, 1151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

MATHEMATICA

a[n_] := GCD[(2n)! + 1, n! + 1]; Select[ Table[ a[n], {n, 1, 1000}], # != 1 &] (* Jean-Fran├žois Alcover, Dec 16 2011 *)

CROSSREFS

Sequence in context: A263231 A077411 A085016 * A196181 A177182 A061809

Adjacent sequences:  A067687 A067688 A067689 * A067691 A067692 A067693

KEYWORD

nonn,nice

AUTHOR

Benoit Cloitre, Feb 04 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 June 19 23:01 EDT 2019. Contains 324222 sequences. (Running on oeis4.)