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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.

A048355 a(n) is the index of the smallest triangular number containing exactly n 0's.

Table of values

n a(n)
1 0
2 24
3 200
4 775
5 2000
6 10000
7 20000
8 100000
9 200000
10 1000000
11 2000000
12 10000000
13 20000000
14 100000000
15 200000000
16 1000000000
17 2000000000
18 10000000000
19 20000000000
20 100000000000
21 200000000000
22 1000000000000
23 2000000000000
24 10000000000000
25 20000000000000
26 100000000000000

List of values

[0, 24, 200, 775, 2000, 10000, 20000, 100000, 200000, 1000000, 2000000, 10000000, 20000000, 100000000, 200000000, 1000000000, 2000000000, 10000000000, 20000000000, 100000000000, 200000000000, 1000000000000, 2000000000000, 10000000000000, 20000000000000, 100000000000000]

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

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