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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.

A299867 The sum of the first n terms of the sequence is the concatenation of the first n digits of the sequence, and a(1) = 4.

Table of values

n a(n)
1 4
2 40
3 396
4 3963
5 39636
6 396357
7 3963567
8 39635676
9 396356757
10 3963567567
11 39635675670
12 396356756706
13 3963567567057
14 39635675670567
15 396356756705673
16 3963567567056727
17 39635675670567276
18 396356756705672757
19 3963567567056727567
20 39635675670567275672
21 396356756705672756722

List of values

[4, 40, 396, 3963, 39636, 396357, 3963567, 39635676, 396356757, 3963567567, 39635675670, 396356756706, 3963567567057, 39635675670567, 396356756705673, 3963567567056727, 39635675670567276, 396356756705672757, 3963567567056727567, 39635675670567275672, 396356756705672756722]

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

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