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.

A268322 Number of length-(n+1) 0..3 arrays with new values introduced in sequential order, and with new repeated values introduced in sequential order, both starting with zero.

Table of values

n a(n)
1 2
2 4
3 11
4 32
5 102
6 337
7 1148
8 3984
9 14030
10 49973
11 179735
12 652010
13 2383857
14 8779485
15 32555471
16 121497802
17 456178652
18 1722502343
19 6538543106
20 24942393310
21 95581407132
22 367817900179
23 1420912978925
24 5508514801624
25 21423891255215

List of values

[2, 4, 11, 32, 102, 337, 1148, 3984, 14030, 49973, 179735, 652010, 2383857, 8779485, 32555471, 121497802, 456178652, 1722502343, 6538543106, 24942393310, 95581407132, 367817900179, 1420912978925, 5508514801624, 21423891255215]

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

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