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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097323 One sixth of the unitary sociable numbers. 1
5, 247, 403, 4030, 5873, 43970, 65955, 78883, 116355, 127270, 368671, 372259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Unfortunately the next term is not an integer, so this sequence is no longer of interest. - N. J. A. Sloane, Nov 07 2006

Next term would be A000173(13)/6=172459210/6 but this is not an integer. Others unitary-sociable numbers which are not divisible by 6 are: 209524210 = 2.5.7.19.263.599, 1799281330 = 2.5.7.11.139.16811, 7009279550 = 2.5^2.7.13.19.89.911, 111375706442 = 2.7.11.13.59.727.1297,... - Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 01 2006

LINKS

Table of n, a(n) for n=1..12.

D. Moews, Perfect, amicable and sociable numbers

J. O. M. Pedersen, Tables of Aliquot Cycles [Broken link]

J. O. M. Pedersen, Tables of Aliquot Cycles [Via Internet Archive Wayback-Machine]

J. O. M. Pedersen, Tables of Aliquot Cycles [Cached copy, pdf file only]

E. Weisstein, Unitary Sociable Numbers

CROSSREFS

Equals A000173(n)/6.

Sequence in context: A327582 A144999 A215910 * A166943 A125533 A068727

Adjacent sequences:  A097320 A097321 A097322 * A097324 A097325 A097326

KEYWORD

nonn,fini,full

AUTHOR

Ralf Stephan, Aug 09 2004

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 July 8 17:40 EDT 2020. Contains 335524 sequences. (Running on oeis4.)