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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.

A332170 a(n) = 7*(10^(2n+1)-1)/9 - 7*10^n.

Table of values

n a(n)
0 0
1 707
2 77077
3 7770777
4 777707777
5 77777077777
6 7777770777777
7 777777707777777
8 77777777077777777
9 7777777770777777777
10 777777777707777777777
11 77777777777077777777777
12 7777777777770777777777777
13 777777777777707777777777777
14 77777777777777077777777777777
15 7777777777777770777777777777777

List of values

[0, 707, 77077, 7770777, 777707777, 77777077777, 7777770777777, 777777707777777, 77777777077777777, 7777777770777777777, 777777777707777777777, 77777777777077777777777, 7777777777770777777777777, 777777777777707777777777777, 77777777777777077777777777777, 7777777777777770777777777777777]

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

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