cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A108047 Concatenation of the previous pair of numbers, with the first two terms both 1.

Original entry on oeis.org

1, 1, 11, 111, 11111, 11111111, 1111111111111, 111111111111111111111, 1111111111111111111111111111111111, 1111111111111111111111111111111111111111111111111111111, 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
Offset: 1

Views

Author

Parthasarathy Nambi, Jun 01 2005

Keywords

Comments

The Fibonacci numbers, A000045, represented in base 1 (see A000042).

Examples

			The third term is 11 which is the concatenation of the first two terms 1 and 1.

Crossrefs

Column b=1 of A214326.
Column k=1 of A214679.
Cf. A037842, A131293.

Formula

a(n) = (10^A000045(n)-1)/9.
a(n) = A000042(A000045(n)).

Extensions

Edited by Jason Kimberley, Dec 15 2012
Showing 1-1 of 1 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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