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.

A333833 Number of permutations p of [n] such that |p(i) - p(i-1)| <= 2 and |p(i) - p(i-2)| <= 3.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 12
5 14
6 18
7 28
8 42
9 56
10 74
11 102
12 144
13 200
14 274
15 376
16 520
17 720
18 994
19 1370
20 1890
21 2610
22 3604
23 4974
24 6864
25 9474
26 13078
27 18052
28 24916
29 34390
30 47468
31 65520
32 90436
33 124826
34 172294
35 237814
36 328250
37 453076
38 625370
39 863184
40 1191434
41 1644510
42 2269880
43 3133064

List of values

[1, 1, 2, 6, 12, 14, 18, 28, 42, 56, 74, 102, 144, 200, 274, 376, 520, 720, 994, 1370, 1890, 2610, 3604, 4974, 6864, 9474, 13078, 18052, 24916, 34390, 47468, 65520, 90436, 124826, 172294, 237814, 328250, 453076, 625370, 863184, 1191434, 1644510, 2269880, 3133064]

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

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