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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.

A299872 The sum of the first n terms of the sequence is the concatenation of the first n digits of the sequence, and a(1) = 9.

Table of values

n a(n)
1 9
2 90
3 891
4 8918
5 89181
6 891802
7 8918027
8 89180271
9 891802702
10 8918027027
11 89180270270
12 891802702701
13 8918027027002
14 89180270270027
15 891802702700263
16 8918027027002637
17 89180270270026371
18 891802702700263702
19 8918027027002637027
20 89180270270026370262
21 891802702700263702622
22 8918027027002637026226

List of values

[9, 90, 891, 8918, 89181, 891802, 8918027, 89180271, 891802702, 8918027027, 89180270270, 891802702701, 8918027027002, 89180270270027, 891802702700263, 8918027027002637, 89180270270026371, 891802702700263702, 8918027027002637027, 89180270270026370262, 891802702700263702622, 8918027027002637026226]

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

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