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 A246853 Numbers n such that sigma(n+3) - sigma(n) = n + 3. 4
 7, 6285, 4693485, 54028959, 75898473, 724416741, 2359059709, 4901493769, 321212249593, 511578306649, 534245763769, 6158645822473 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also numbers n such that A001065(n+3) = A000203(n). - Michel Marcus, Sep 06 2014 a(13) > 10^13. - Giovanni Resta, Jul 13 2015 LINKS EXAMPLE Number 7 is in sequence because sigma(7+3) - sigma(7) = 18 - 8 = 10 = 7 + 3. PROG (MAGMA) [n:n in[1..10^7] | SumOfDivisors(n+3)-SumOfDivisors(n) eq n+3] (PARI) for(n=1, 10^7, if(sigma(n+3)-sigma(n)==n+3, print1(n, ", "))) \\ Derek Orr, Sep 05 2014 CROSSREFS Cf. A000203, A067816, A246851, A246852, A246854, A246855. Sequence in context: A203693 A125036 A098803 * A225067 A281358 A068575 Adjacent sequences:  A246850 A246851 A246852 * A246854 A246855 A246856 KEYWORD nonn,more AUTHOR Jaroslav Krizek, Sep 05 2014 EXTENSIONS a(4)-a(8) from Hiroaki Yamanouchi, Sep 10 2014 a(9)-a(12) from Giovanni Resta, Jul 13 2015 STATUS approved

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Last modified October 15 07:56 EDT 2019. Contains 328026 sequences. (Running on oeis4.)