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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.

A000483 Associated Stirling numbers: second-order reciprocal Stirling numbers (Fekete) a(n) = [[n, 3]]. The number of 3-orbit permutations of an n-set with at least 2 elements in each orbit.

Table of values

n a(n)
6 15
7 210
8 2380
9 26432
10 303660
11 3678840
12 47324376
13 647536032
14 9418945536
15 145410580224
16 2377609752960
17 41082721413120
18 748459539843840
19 14345340443665920
20 288650580508961280
21 6085390148673177600
22 134167064248901376000
23 3088040233895705088000
24 74077507611407752704000
25 1849221425299053367296000

List of values

[15, 210, 2380, 26432, 303660, 3678840, 47324376, 647536032, 9418945536, 145410580224, 2377609752960, 41082721413120, 748459539843840, 14345340443665920, 288650580508961280, 6085390148673177600, 134167064248901376000, 3088040233895705088000, 74077507611407752704000, 1849221425299053367296000]

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

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