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Search: id:A066042
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| A066042 |
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n divided by (sum of digits of n times product of digits of n) is prime. |
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+0
2
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| 12, 111, 216, 432, 41112, 81216, 186624, 248832, 311472, 316224, 341712, 422144, 714112, 1131111, 1131732, 1191915, 1211328, 1292112, 1418112, 2192832, 3112128, 4331232, 11127424, 11311272, 18122112, 21111192, 26726112, 28422144
(list; graph; listen)
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OFFSET
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12,1
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FORMULA
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Sum digits of n; take product of digits of n; multiply sum by product and divide into n. If prime, add to sequence.
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EXAMPLE
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a(1)=111 because 1+1+1=3, and 1*1*1=1, and 3*1=3, and 111/3=37, and 37 is prime.
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CROSSREFS
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Cf. A038369, A049102, A066146.
Sequence in context: A049102 A075231 A085773 this_sequence A036733 A123933 A077754
Adjacent sequences: A066039 A066040 A066041 this_sequence A066043 A066044 A066045
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KEYWORD
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easy,nonn
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Dec 13 2001
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EXTENSIONS
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Checked to over 10^8 (110,508,539) without finding another example.
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