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.

A240237 Concatenated digits of pyramidalized numbers: Write the decimal digits of n (a nonnegative integer) and take successive absolute differences ("pyramidalization"), then concatenate, from left to right, all the digits in each level of the pyramid, and finally concatenate those results for all levels, from the base up. The result is a(n).

Table of values

n a(n)
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 101
11 110
12 121
13 132
14 143
15 154
16 165
17 176
18 187
19 198
20 202
21 211
22 220
23 231
24 242
25 253
26 264
27 275
28 286
29 297
30 303
31 312
32 321
33 330
34 341
35 352
36 363
37 374
38 385
39 396
40 404
41 413
42 422
43 431
44 440
45 451
46 462
47 473
48 484
49 495
50 505
51 514
52 523
53 532
54 541
55 550
56 561
57 572
58 583
59 594
60 606
61 615

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 101, 110, 121, 132, 143, 154, 165, 176, 187, 198, 202, 211, 220, 231, 242, 253, 264, 275, 286, 297, 303, 312, 321, 330, 341, 352, 363, 374, 385, 396, 404, 413, 422, 431, 440, 451, 462, 473, 484, 495, 505, 514, 523, 532, 541, 550, 561, 572, 583, 594, 606, 615]

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

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