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A019552
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n followed by 4n.
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0
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14, 28, 312, 416, 520, 624, 728, 832, 936, 1040, 1144, 1248, 1352, 1456, 1560, 1664, 1768, 1872, 1976, 2080, 2184, 2288, 2392, 2496, 25100, 26104, 27108, 28112, 29116, 30120, 31124, 32128, 33132, 34136, 35140, 36144, 37148, 38152, 39156, 40160, 41164
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| Sylvester Smith, "A Set of Conjectures on Smarandache Sequences", Bulletin of Pure and Applied Sciences, (Bombay, India), Vol. 15 E (No. 1), 1996, pp. 101-107.
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LINKS
| M. L. Perez et al., eds., Smarandache Notions Journal
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FORMULA
| a(n)=n*10^floor[log10(4*n)+1]+4*n, with n>=1 [From Paolo P. Lava (paoloplava(AT)gmail.com), Mar 24 2010]
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MATHEMATICA
| Table[FromDigits[Join[IntegerDigits[n], IntegerDigits[4n]]], {n, 50}] (* From Harvey P. Dale, May 11 2011 *)
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CROSSREFS
| Sequence in context: A077265 A033847 A067295 * A174070 A045527 A041384
Adjacent sequences: A019549 A019550 A019551 * A019553 A019554 A019555
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KEYWORD
| nonn,base
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AUTHOR
| R. Muller
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