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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.

A247083 a(n) = 0 for n <= 0: Starting with n=1, a(n) = 1 + the sum of the digital sums of a(0) through a(n-3).

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 2
5 3
6 4
7 6
8 9
9 13
10 19
11 28
12 32
13 42
14 52
15 57
16 63
17 70
18 82
19 91
20 98
21 108
22 118
23 135
24 144
25 154
26 163
27 172
28 182
29 192
30 202
31 213
32 225
33 229
34 235
35 244
36 257
37 267
38 277
39 291
40 306
41 322
42 334
43 343
44 350
45 360
46 370
47 378
48 387
49 397
50 415
51 433
52 452
53 462
54 472
55 483
56 495
57 508
58 523
59 541
60 554
61 564
62 574

List of values

[0, 1, 1, 1, 2, 3, 4, 6, 9, 13, 19, 28, 32, 42, 52, 57, 63, 70, 82, 91, 98, 108, 118, 135, 144, 154, 163, 172, 182, 192, 202, 213, 225, 229, 235, 244, 257, 267, 277, 291, 306, 322, 334, 343, 350, 360, 370, 378, 387, 397, 415, 433, 452, 462, 472, 483, 495, 508, 523, 541, 554, 564, 574]

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

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