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.

A006920 At each step, record how many 1's, 2's, etc. have been seen so far in the sequence.

Table of values

n a(n)
1 1
2 1
3 2
4 21
5 32
6 331
7 433
8 4351
9 53621
10 647221
11 7673221
12 8883233
13 891132333
14 8101532334101
15 101118423351110001
16 141220533351220001001
17 17142355335122101100101
18 23162558335122102101101001
19 30192751033612210211110100201
20 3823295114361321021111110020101001

List of values

[1, 1, 2, 21, 32, 331, 433, 4351, 53621, 647221, 7673221, 8883233, 891132333, 8101532334101, 101118423351110001, 141220533351220001001, 17142355335122101100101, 23162558335122102101101001, 30192751033612210211110100201, 3823295114361321021111110020101001]

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

Content is available under The OEIS End-User License Agreement.