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.

A127389 Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutations A127377/A127378 and A127387.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 4
6 10
7 23
8 56
9 138
10 344
11 870
12 2220
13 5716
14 14828
15 38717
16 101682
17 268416
18 711810
19 1895432
20 5066030
21 13586082
22 36547534
23 98593064
24 266661162
25 722953814
26 1964358938
27 5348367006
28 14589803090
29 39870312218
30 109136843138

List of values

[1, 1, 0, 1, 2, 4, 10, 23, 56, 138, 344, 870, 2220, 5716, 14828, 38717, 101682, 268416, 711810, 1895432, 5066030, 13586082, 36547534, 98593064, 266661162, 722953814, 1964358938, 5348367006, 14589803090, 39870312218, 109136843138]

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

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