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.

A272494 Number of ordered set partitions of [n] with nondecreasing block sizes and maximal block size equal to four.

Table of values

n a(n)
4 1
5 5
6 45
7 350
8 3290
9 30870
10 334950
11 3765300
12 46950750
13 617867250
14 8815156350
15 133031398500
16 2149039893000
17 36645888279000
18 662781093975000
19 12612741639498000
20 252857867367105000
21 5314211504296695000
22 117053051989758885000
23 2693288170000578150000

List of values

[1, 5, 45, 350, 3290, 30870, 334950, 3765300, 46950750, 617867250, 8815156350, 133031398500, 2149039893000, 36645888279000, 662781093975000, 12612741639498000, 252857867367105000, 5314211504296695000, 117053051989758885000, 2693288170000578150000]

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

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