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.

A111279 Number of permutations avoiding the patterns {3241,3421,4321}; number of weak sorting class based on 3241.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 21
5 79
6 309
7 1237
8 5026
9 20626
10 85242
11 354080
12 1476368
13 6173634
14 25873744
15 108628550
16 456710589
17 1922354351
18 8098984433
19 34147706833
20 144068881455
21 608151037123
22 2568318694867
23 10850577045131
24 45856273670841
25 193850277807569
26 819669810565949

List of values

[1, 1, 2, 6, 21, 79, 309, 1237, 5026, 20626, 85242, 354080, 1476368, 6173634, 25873744, 108628550, 456710589, 1922354351, 8098984433, 34147706833, 144068881455, 608151037123, 2568318694867, 10850577045131, 45856273670841, 193850277807569, 819669810565949]

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

Content is available under The OEIS End-User License Agreement.