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 A337385 Odd numbers k for which A003973(k) >= 2*A003961(k). 1
 334639305, 1003917915, 1265809545, 1353106755, 1673196525, 2109682575, 2255177925, 2342475135, 2553826275, 2691663975, 2729952225, 2953555605, 2982654675, 3011753745, 3128150025, 3157249095, 3234846615, 3258330075, 3419140725, 3442113675, 3681032355, 3797428635, 3855626775, 4059320265, 4292112825, 4350310965 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Provided that there are no odd perfect numbers, then applying A003961 to each term and sorting into ascending order gives A115414. Apparently, all terms are divisible by 255255 = 3*5*7*11*13*17. - Hugo Pfoertner, Sep 24 2020 LINKS PROG (PARI) A003961(n) = { my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); }; isA337385(n) = if(!(n%2), 0, my(x=A003961(n)); (sigma(x)>=2*x)); CROSSREFS Subsequence of A337386. Cf. A000203, A003961, A003973, A115414. Sequence in context: A222978 A353541 A271112 * A233703 A230085 A204337 Adjacent sequences:  A337382 A337383 A337384 * A337386 A337387 A337388 KEYWORD nonn AUTHOR Antti Karttunen, Aug 31 2020 STATUS approved

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)