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Search: id:A144980
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| A144980 |
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Natural numbers n such that n+1 is divisible by the sum of the decimal digits of n |
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+0
1
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| 1, 10, 11, 14, 19, 31, 34, 65, 71, 79, 100, 101, 103, 104, 109, 143, 160, 164, 167, 211, 215, 223, 263, 293, 299, 337, 362, 367, 379, 412, 419, 431, 454, 458, 461, 479, 503, 545, 560, 571, 601, 655, 659, 671, 689, 764, 769, 799, 805, 839, 892, 896, 917, 922
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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1+1 = 2 is divisible by 1, hence 1 is in the sequence; 65+1 = 66 is divisible by 6+5 = 11, hence 65 is in the sequence.
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MAPLE
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A007953 := proc(n) local d; add(d, d=convert(n, base, 10)) ; end: isA144980 := proc(n) RETURN( (n+1) mod A007953(n) = 0 ) ; end: for n from 1 to 1800 do if isA144980(n) then printf("%d, ", n) ; fi; od: [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 30 2008]
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CROSSREFS
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Cf. A144967.
Cf. A005349. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 30 2008]
Sequence in context: A095038 A085186 A062844 this_sequence A043583 A043773 A043779
Adjacent sequences: A144977 A144978 A144979 this_sequence A144981 A144982 A144983
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KEYWORD
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nonn,base
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 28 20
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EXTENSIONS
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a(1) inserted, extended beyond a(7). Example added, cross-reference added. Keyword base added, keyword more deleted, offset changed from 1,1 to 1,2. - Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 30 2008
Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 30 2008
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