A105310 a(n) = concatenation of i n times, with i = 1 to n.

1, 1122, 111222333, 1111222233334444, 1111122222333334444455555, 111111222222333333444444555555666666, 1111111222222233333334444444555555566666667777777

Offset

21,2

References

F. Smarandache, "Properties of the numbers", Univ. of Craiova Archives, 1975; Arizona State University Special Collections, Tempe, AZ.

Links

Table of n, a(n) for n=21..27.

Eric Weisstein's World of Mathematics, Smarandache Sequences.

Example

a(10)=concatenation of (1^10)(2^10)(3^10)...(9^10)(10^10)

Crossrefs

Cf. A098129, A000461.

Sequence in context: A158729 A346219 A035859 * A200072 A261264 A125840

Adjacent sequences: A105307 A105308 A105309 * A105311 A105312 A105313

Keyword

base,easy,nonn,less

Author

Alexandre Wajnberg, Apr 25 2005

Status

approved