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 A246855 Numbers n such that sigma(n+5) - sigma(n) = n + 5. 4
 3577, 14773, 2843579 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also numbers n such that A001065(n+5) = A000203(n). - Michel Marcus, Sep 06 2014 a(4) (if it exists) > 10^11. - Hiroaki Yamanouchi, Sep 10 2014 a(4) (if it exists) > 10^13. - Giovanni Resta, Jul 13 2015 LINKS EXAMPLE Number 3577 is in sequence because sigma(3577+5) - sigma(3577) = 7800 - 4218 = 3582 = 3577 + 5. PROG (MAGMA) [n:n in[1..10^7] | SumOfDivisors(n+5)-SumOfDivisors(n) eq n+5] (PARI) for(n=1, 10^7, if(sigma(n+5)-sigma(n)==n+5, print1(n, ", "))) \\ Derek Orr, Sep 05 2014 CROSSREFS Cf. A000203, A067816, A246851, A246852, A246853, A246854. Sequence in context: A004932 A004952 A004972 * A252153 A234138 A249289 Adjacent sequences:  A246852 A246853 A246854 * A246856 A246857 A246858 KEYWORD nonn,bref,more AUTHOR Jaroslav Krizek, Sep 05 2014 STATUS approved

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Last modified October 21 11:42 EDT 2019. Contains 328296 sequences. (Running on oeis4.)