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.

A116844 Number of permutations of length n which avoid the patterns 231, 12345.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 14
5 41
6 116
7 302
8 715
9 1549
10 3106
11 5831
12 10352
13 17525
14 28484
15 44696
16 68021
17 100777
18 145810
19 206569
20 287186
21 392561
22 528452
23 701570
24 919679
25 1191701
26 1527826
27 1939627
28 2440180
29 3044189
30 3768116
31 4630316
32 5651177
33 6853265
34 8261474
35 9903181
36 11808406

List of values

[1, 1, 2, 5, 14, 41, 116, 302, 715, 1549, 3106, 5831, 10352, 17525, 28484, 44696, 68021, 100777, 145810, 206569, 287186, 392561, 528452, 701570, 919679, 1191701, 1527826, 1939627, 2440180, 3044189, 3768116, 4630316, 5651177, 6853265, 8261474, 9903181, 11808406]

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

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