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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.

A231689 a(n) = Sum_{i=0..n} digsum(i)^4, where digsum(i) = A007953(i).

Table of values

n a(n)
0 0
1 1
2 17
3 98
4 354
5 979
6 2275
7 4676
8 8772
9 15333
10 15334
11 15350
12 15431
13 15687
14 16312
15 17608
16 20009
17 24105
18 30666
19 40666
20 40682
21 40763
22 41019
23 41644
24 42940
25 45341
26 49437
27 55998
28 65998
29 80639
30 80720
31 80976
32 81601
33 82897
34 85298
35 89394
36 95955
37 105955
38 120596
39 141332
40 141588
41 142213
42 143509
43 145910
44 150006
45 156567
46 166567
47 181208
48 201944
49 230505
50 231130
51 232426
52 234827
53 238923

List of values

[0, 1, 17, 98, 354, 979, 2275, 4676, 8772, 15333, 15334, 15350, 15431, 15687, 16312, 17608, 20009, 24105, 30666, 40666, 40682, 40763, 41019, 41644, 42940, 45341, 49437, 55998, 65998, 80639, 80720, 80976, 81601, 82897, 85298, 89394, 95955, 105955, 120596, 141332, 141588, 142213, 143509, 145910, 150006, 156567, 166567, 181208, 201944, 230505, 231130, 232426, 234827, 238923]

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