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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.

A055619 a(n) = A*10^(4*n+1)+B with A=99000*(10^(4*n)-1)/9999+10 and B=9900*(10^(4*n)-1)/9999+1.

Table of values

n a(n)
1 9901009901
2 990099010099009901
3 99009900990100990099009901
4 9900990099009901009900990099009901
5 990099009900990099010099009900990099009901

List of values

[9901009901, 990099010099009901, 99009900990100990099009901, 9900990099009901009900990099009901, 990099009900990099010099009900990099009901]

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

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