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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.

A000866 2^n written in base 5.

Table of values

n a(n)
0 1
1 2
2 4
3 13
4 31
5 112
6 224
7 1003
8 2011
9 4022
10 13044
11 31143
12 112341
13 230232
14 1011014
15 2022033
16 4044121
17 13143242
18 31342034
19 113234123
20 232023301
21 1014102102
22 2033204204
23 4121413413
24 13243332331
25 32042220212
26 114134440424
27 233324431403
28 1022204413311

List of values

[1, 2, 4, 13, 31, 112, 224, 1003, 2011, 4022, 13044, 31143, 112341, 230232, 1011014, 2022033, 4044121, 13143242, 31342034, 113234123, 232023301, 1014102102, 2033204204, 4121413413, 13243332331, 32042220212, 114134440424, 233324431403, 1022204413311]

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

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