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A162672
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Dismal product 19*n.
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2
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0, 11, 12, 13, 14, 15, 16, 17, 18, 19, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Since 19 is the smallest dismal prime, this is a kind of dismal analog of the even numbers.
As the b-file shows, this sequence is not monotonic and contains repetitions.
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LINKS
| N. J. A. Sloane, Table of n, a(n) for n = 0..10000
D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic
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FORMULA
| For a two-digit number n, the dismal product 19*n is obtained by putting a 1 in front of n.
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EXAMPLE
| 19 * 3 = 13, so 13 is a member. 1109 has just two divisors, 9 and 109, so 1109 is not a member.
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CROSSREFS
| Cf. A087062, A078645.
Sequence in context: A162903 A038687 A070255 * A110403 A119247 A138595
Adjacent sequences: A162669 A162670 A162671 * A162673 A162674 A162675
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KEYWORD
| nonn,base
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AUTHOR
| Emilie Hogan, Dennis Hou, Kellen Myers and N. J. A. Sloane (njas(AT)research.att.com), Apr 09 2010
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EXTENSIONS
| Entry revised by N. J. A. Sloane, May 28 2011, to correct errors in some of the comments
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