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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.

A202606 a(n) = ceiling(((10^n - 1)^2/9 + 10^n)/18).

Table of values

n a(n)
0 1
1 2
2 67
3 6217
4 617717
5 61732717
6 6172882717
7 617284382717
8 61728399382717
9 6172839549382717
10 617283951049382717
11 61728395066049382717
12 6172839506216049382717
13 617283950617716049382717
14 61728395061732716049382717
15 6172839506172882716049382717

List of values

[1, 2, 67, 6217, 617717, 61732717, 6172882717, 617284382717, 61728399382717, 6172839549382717, 617283951049382717, 61728395066049382717, 6172839506216049382717, 617283950617716049382717, 61728395061732716049382717, 6172839506172882716049382717]

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

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