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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.

A330489 a(n) is equal to a(n-1) plus (a(n-1) written in base n but interpreted in base n+1), with a(1)=1.

Table of values

n a(n)
1 1
2 2
3 4
4 9
5 19
6 41
7 87
8 193
9 427
10 940
11 2049
12 4619
13 10363
14 22921
15 50522
16 111018
17 248438
18 554112
19 1232067
20 2723158
21 6003186
22 13446356
23 30050952
24 66594552
25 147234100
26 324832999
27 714046741
28 1585188074
29 3511557725
30 7762753394
31 17129248715
32 37693951852
33 82773271861

List of values

[1, 2, 4, 9, 19, 41, 87, 193, 427, 940, 2049, 4619, 10363, 22921, 50522, 111018, 248438, 554112, 1232067, 2723158, 6003186, 13446356, 30050952, 66594552, 147234100, 324832999, 714046741, 1585188074, 3511557725, 7762753394, 17129248715, 37693951852, 82773271861]

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

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