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A105311
a(n) = n concatenations of numbers from 1 to n, concatenated.
0
1, 1212, 123123123, 1234123412341234, 12345123451234512345, 123456123456123456123456123456123456, 1234567123456712345671234567123456712345671234567
OFFSET
1,2
REFERENCES
F. Smarandache, "Properties of the numbers", Univ. of Craiova Archives, 1975; Arizona State University Special Collections, Tempe, AZ.
LINKS
Eric Weisstein's World of Mathematics, Smarandache Sequences.
CROSSREFS
Sequence in context: A250159 A184464 A204331 * A252125 A251815 A130680
KEYWORD
easy,nonn,base
AUTHOR
Alexandre Wajnberg, Apr 25 2005
STATUS
approved