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Search: id:A137464
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| A137464 |
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Concatenation of n and a list of the divisors of n. |
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+0
1
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| 11, 212, 313, 4124, 515, 61236, 717, 81248, 9139, 1012510, 11111, 121234612, 13113, 1412714, 1513515, 16124816, 17117, 181236918, 19119, 2012451020, 2113721, 22121122, 23123, 241234681224, 251525, 26121326, 2713927, 2812471428, 29129
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(12), divisors of 12 are 1,2,3,4,6,12, so a(12) = 121234612
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MAPLE
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cat2 := proc(a, b) a*10^max(ilog10(b)+1, 1)+b ; end: A137464 := proc(n) local a, d; a := n ; for d in sort(convert(numtheory[divisors](n), list)) do a := cat2(a, d) ; od: RETURN(a) ; end: seq(A137464(n), n=1..50) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 25 2008
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CROSSREFS
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Sequence in context: A088061 A070220 A134069 this_sequence A035012 A055411 A064093
Adjacent sequences: A137461 A137462 A137463 this_sequence A137465 A137466 A137467
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KEYWORD
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easy,nonn,base,less
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AUTHOR
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Ctibor O. Zizka (ctibor.zizka(AT)seznam.cz), Apr 19 2008
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EXTENSIONS
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Definition corrected by Omar E. Pol, Apr 21 2008
More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 25 2008
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