Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A054903
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A054903 Complement of A023201 with respect to A015914. +0
4
104, 147, 596, 1415, 4850, 5337, 370047, 1630622, 35020303, 120221396, 3954451796 (list; graph; listen)
OFFSET

1,1

COMMENT

Below 1000000 only 7 such composite numbers were found beside more than 16000 primes..

REFERENCES

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 104, p. 37, Ellipses, Paris 2008.

FORMULA

Composite numbers n so that Sigma[n]+6=Sigma[n+6].

EXAMPLE

n=104,Sigma[104]+6=210+6=216=Sigma[104+6]=Sigma[110]

CROSSREFS

A015913-A015917, A023200-A023203, A046133, A001359, A054799.

Sequence in context: A095641 A055036 A052476 this_sequence A074228 A044336 A044717

Adjacent sequences: A054900 A054901 A054902 this_sequence A054904 A054905 A054906

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), May 23 2000

EXTENSIONS

More terms from Jud McCranie (j.mccranie(AT)comcast.net), May 25 2000

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified September 5 17:15 EDT 2008. Contains 143476 sequences.


AT&T Labs Research