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.

A071076 Number of permutations that avoid the generalized pattern 123-4.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 23
5 108
6 598
7 3815
8 27532
9 221708
10 1970251
11 19150132
12 202064380
13 2300071071
14 28092017668
15 366425723926
16 5083645400819
17 74745472084176
18 1160974832572274
19 18995175706664735
20 326531476287842760
21 5883736110875887560
22 110893188848753125475

List of values

[1, 1, 2, 6, 23, 108, 598, 3815, 27532, 221708, 1970251, 19150132, 202064380, 2300071071, 28092017668, 366425723926, 5083645400819, 74745472084176, 1160974832572274, 18995175706664735, 326531476287842760, 5883736110875887560, 110893188848753125475]

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

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