cp's OEIS Frontend

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.

A338226 a(n) = Sum_{i=0..n-1} i*10^i - Sum_{i=0..n-1} (n-1-i)*10^i.

Table of values

n a(n)
1 0
2 9
3 198
4 3087
5 41976
6 530865
7 6419754
8 75308643
9 864197532
10 9753086421
11 108641975310
12 1197530864199
13 13086419753088
14 141975308641977
15 1530864197530866
16 16419753086419755
17 175308641975308644
18 1864197530864197533
19 19753086419753086422
20 208641975308641975311
21 2197530864197530864200

List of values

[0, 9, 198, 3087, 41976, 530865, 6419754, 75308643, 864197532, 9753086421, 108641975310, 1197530864199, 13086419753088, 141975308641977, 1530864197530866, 16419753086419755, 175308641975308644, 1864197530864197533, 19753086419753086422, 208641975308641975311, 2197530864197530864200]