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A067065
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Numbers n such that sigma(sigma(sigma(n))) == 6*sigma(n).
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1
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20, 26, 41, 44, 65, 83, 132, 133, 140, 182, 188, 195, 249, 287, 299, 420, 546, 564, 620, 644, 764, 806, 861, 897, 1001, 1115, 1169, 1271, 28644, 32172, 35052, 39116, 40796, 41478, 42315, 47492, 50162, 51513, 52143, 53745, 54033, 54483, 56427, 56642
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,146
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PROG
| (PARI) { n=0; for (m=1, 10^10, if (sigma(sigma(sigma(m))) == 6*sigma(m), write("b067065.txt", n++, " ", m); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 03 2010]
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CROSSREFS
| Sequence in context: A070684 A167306 A061840 * A101070 A070717 A114813
Adjacent sequences: A067062 A067063 A067064 * A067066 A067067 A067068
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KEYWORD
| nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 17 2002
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EXTENSIONS
| Definition corrected by Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 03 2010
Terms added by Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 03 2010
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