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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.

A071075 Number of permutations that avoid the generalized pattern 132-4.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 23
5 107
6 585
7 3671
8 25986
9 204738
10 1776327
11 16824237
12 172701135
13 1909624371
14 22626612450
15 285982186662
16 3840440707485
17 54603776221965
18 819424594880559
19 12942757989763101
20 214626518776190178
21 3728112755679416898
22 67692934780306842501
23 1282399636333412178531
24 25303124674163685176793

List of values

[1, 1, 2, 6, 23, 107, 585, 3671, 25986, 204738, 1776327, 16824237, 172701135, 1909624371, 22626612450, 285982186662, 3840440707485, 54603776221965, 819424594880559, 12942757989763101, 214626518776190178, 3728112755679416898, 67692934780306842501, 1282399636333412178531, 25303124674163685176793]

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

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