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A120497
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Natural numbers n with number of divisors equal to a perfect power.
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0
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1, 6, 8, 10, 14, 15, 21, 22, 24, 26, 27, 30, 33, 34, 35, 36, 38, 39, 40, 42, 46, 51, 54, 55, 56, 57, 58, 62, 65, 66, 69, 70, 74, 77, 78, 82, 85, 86, 87, 88, 91, 93, 94, 95, 100, 102, 104, 105, 106, 110, 111, 114, 115, 118, 119, 120, 122, 123, 125, 128, 129, 130, 133, 134
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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PROG
| (PARI) v=[1]; for(n=2, 134, if(ispower(numdiv(n)), v=concat(v, n))); v (Hobson)
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CROSSREFS
| Sequence in context: A086822 A048943 A130763 * A036436 A036455 A007422
Adjacent sequences: A120494 A120495 A120496 * A120498 A120499 A120500
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KEYWORD
| easy,nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 06 2006
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EXTENSIONS
| More terms from Nick Hobson Nov 29 2006
Incorrect comment removed by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Mar 25 2010
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