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.

A201381 Number of nX5 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.

Table of values

n a(n)
1 2
2 9
3 115
4 483
5 7148
6 24779
7 295813
8 804538
9 7711613
10 17135660
11 137991357
12 261853930
13 1838296465
14 3078156753
15 19352193027
16 29273561002
17 168059197372
18 233637796573
19 1242746736360
20 1608517392555
21 8015798428649
22 9756858004272

List of values

[2, 9, 115, 483, 7148, 24779, 295813, 804538, 7711613, 17135660, 137991357, 261853930, 1838296465, 3078156753, 19352193027, 29273561002, 168059197372, 233637796573, 1242746736360, 1608517392555, 8015798428649, 9756858004272]

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

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