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Search: id:A075048
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| A075048 |
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10-smooth numbers which show their prime factors. |
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+0
1
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| 1, 2, 3, 5, 7, 135, 175, 735, 1715, 13122, 131712, 2333772
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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A number n is in the sequence if it has only non-composite digits (1,2,3,5,7) and a prime p divides n if and only if p is a digit of n.
No other terms below 10^13.
No more terms < 10^100. - David Wasserman (dwasserm(AT)earthlink.net), Jan 04 2005
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EXAMPLE
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131712 is a member because 131712 = 2*2*2*2*2*2*2*3*7*7*7; the prime factors are digits, and the digits are factors.
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CROSSREFS
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Sequence in context: A071119 A046705 A054218 this_sequence A098463 A064155 A069803
Adjacent sequences: A075045 A075046 A075047 this_sequence A075049 A075050 A075051
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KEYWORD
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base,more,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 03 2002
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EXTENSIONS
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Edited by Don Reble (djr(AT)nk.ca), Jun 07 2003
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