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A067803
Numbers n such that sigma(n)-sigma(n+1)=n.
2
532, 954, 104944, 918080, 10368512, 25316030960, 35053995440, 45883878740
OFFSET
1,1
COMMENTS
Mersenne primes are solutions to sigma(n+1)-sigma(n)=n. Conjecture: sequence gives even values only.
Subsequence of A223136. a(9) > 10^13. - Giovanni Resta, Jun 04 2016
CROSSREFS
Cf. A223136.
Sequence in context: A191950 A333102 A048055 * A098258 A160176 A077085
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 07 2002
EXTENSIONS
a(4)-a(8) from Donovan Johnson, Feb 01 2009
STATUS
approved