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A078206
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Smallest multiple of the concatenation of n down to 1 that begins with the concatenation of 1 up to n.
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2
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1, 126, 123264, 12340776, 1234553367, 123456631959, 12345677303863, 1234567810050426, 123456789137345679, 1234567891008671105551, 1234567891011073225118178, 123456789101112073716778055751
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Robert Gerbicz (robert.gerbicz(AT)gmail.com), May 09 2008, Table of n, a(n) for n = 1..17
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EXAMPLE
| a(3) = 123264 = 321*384.
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PROG
| (PARI) A=B=0; e=f=0; U=1; for(n=1, 17, if(n==U, U*=10; f++); A=U*A+n; B+=n*10^e; e+=f; T=1; C=A; while((-C)%B>=T, T*=10; C*=10); print1(C+(-C)%B", ")) - Robert Gerbicz (robert.gerbicz(AT)gmail.com), May 09 2008
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CROSSREFS
| Cf. A078207.
Sequence in context: A027491 A165028 A178189 * A025037 A051335 A186995
Adjacent sequences: A078203 A078204 A078205 * A078207 A078208 A078209
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 22 2002
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EXTENSIONS
| More terms from Robert Gerbicz (robert.gerbicz(AT)gmail.com), May 09 2008
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