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.

A232864 Number of permutations of n elements not cyclically containing the consecutive pattern 123.

Table of values

n a(n)
0 1
1 1
2 2
3 3
4 12
5 45
6 234
7 1323
8 8856
9 65529
10 543510
11 4937031
12 49030596
13 526930677
14 6101871426
15 75686176035
16 1001517264432
17 14079895613937
18 209594037600558
19 3293305758743679
20 54470994630103260
21 945988795762018029
22 17211193919411902938
23 327371367293394753627

List of values

[1, 1, 2, 3, 12, 45, 234, 1323, 8856, 65529, 543510, 4937031, 49030596, 526930677, 6101871426, 75686176035, 1001517264432, 14079895613937, 209594037600558, 3293305758743679, 54470994630103260, 945988795762018029, 17211193919411902938, 327371367293394753627]

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

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