|
| |
|
|
A059118
|
|
Composite solutions to sigma(x)+8=sigma(x+8).
|
|
3
| |
|
|
27, 1615, 1885, 218984, 4218475, 312016315, 746314601, 1125845307, 1132343549, 1296114929, 9016730984
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
REFERENCES
| The first 4 terms were found by Labos E. (labos(AT)ana.sote.hu), see A015915.
|
|
|
EXAMPLE
| sigma(27)+8 = 48 = sigma(27+8), so 27 is in the sequence.
|
|
|
MATHEMATICA
| ta={{0}}; Do[If[Equal[DivisorSigma[1, n+8] -DivisorSigma[1, n]-8, 0]&&!PrimeQ[n], Print[n]; ta=Append[ta, n]], {n, 1000000000, 1300000000}]; ta=Delete[ta, 1] (Labos)
|
|
|
CROSSREFS
| Cf. A015915.
Sequence in context: A042404 A073224 A184689 * A017199 A013779 A075081
Adjacent sequences: A059115 A059116 A059117 * A059119 A059120 A059121
|
|
|
KEYWORD
| nonn,more
|
|
|
AUTHOR
| Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu), Jan 06 2001
|
|
|
EXTENSIONS
| a(8)-a(10) terms from Labos E.(Jan 10 2005);
Offset corrected and a(11) added by Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 07 2008
|
| |
|
|
