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.

A139310 Has two properties: concatenation of its digits is same string as concatenation of digits of its first differences and every number appears exactly one of the sequence or its first differences.

Table of values

n a(n)
1 1
2 12
3 14
4 155
5 160
6 211
7 271
8 292
9 419
10 548
11 572
12 591
13 645
14 653
15 710
16 735
17 744
18 760
19 764
20 820
21 873
22 880
23 890
24 963
25 1537
26 1584
27 2191
28 2197
29 2245
30 2265
31 2352
32 2355
33 11163
34 11253
35 11349
36 11380
37 11917
38 11932
39 12016
40 12235
41 12356
42 12453
43 12475
44 12520
45 12746

List of values

[1, 12, 14, 155, 160, 211, 271, 292, 419, 548, 572, 591, 645, 653, 710, 735, 744, 760, 764, 820, 873, 880, 890, 963, 1537, 1584, 2191, 2197, 2245, 2265, 2352, 2355, 11163, 11253, 11349, 11380, 11917, 11932, 12016, 12235, 12356, 12453, 12475, 12520, 12746]