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A103123
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1/4-Smith Numbers.
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2
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19899699, 36969999, 36999699, 39699969, 39999399, 39999993, 66699699, 66798798, 67967799, 67987986, 69759897, 69889389, 69966699, 69996993, 76668999, 79488798, 79866798, 85994799, 86686886, 89769759, 89866568
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| McDaniel, W.L., "The Existence of infinitely Many k- Smith numbers", Fibonacci Quarterly, 25(1987), pp. 76-80.
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LINKS
| S.S.Gupta, Smith Numbers.
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EXAMPLE
| 19899699 is a 4^(-1) Smith number because digit sum of 19899699 i.e. S(19899699) = 1 + 9 + 8 + 9 +9 + 6 + 9 + 9=60, which is equal to 4 times the sum of the digits of its prime factors i.e.4x Sp (19899699) =4 x Sp (3 x 2203 x 3011) = 4 x( 3 + 2 + 2+ 0 + 3 + 3 + 0 + 1 + 1) = 15.
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CROSSREFS
| Cf. A006753.
Sequence in context: A017659 A172767 A122557 * A107618 A050945 A116497
Adjacent sequences: A103120 A103121 A103122 * A103124 A103125 A103126
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KEYWORD
| base,nonn
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AUTHOR
| Shyam Sunder Gupta (guptass(AT)rediffmail.com), Mar 16 2005
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