OFFSET
1,5
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
MAPLE
seq(igcd(numtheory:-sigma(n+1), numtheory:-sigma(n)), n=1..100); # Robert Israel, Jul 03 2017
MATHEMATICA
Table[GCD[DivisorSigma[1, n + 1], DivisorSigma[1, n]] , {n, 1, 50}] (* G. C. Greubel, Jul 03 2017 *)
PROG
(PARI) t=1; for (n=1, 1000, s=sigma(n+1); write("b060780.txt", n, " ", gcd(s, t)); t=s) \\ Harry J. Smith, Jul 11 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Apr 26 2001
EXTENSIONS
Name corrected by Robert Israel, Jul 03 2017
STATUS
approved