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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.

A089408 Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A089864.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 2
5 2
6 4
7 5
8 10
9 14
10 28
11 42
12 84
13 132
14 264
15 429
16 858
17 1430
18 2860
19 4862
20 9724
21 16796
22 33592
23 58786
24 117572
25 208012
26 416024
27 742900
28 1485800
29 2674440
30 5348880
31 9694845
32 19389690
33 35357670
34 70715340
35 129644790
36 259289580
37 477638700

List of values

[1, 1, 2, 1, 2, 2, 4, 5, 10, 14, 28, 42, 84, 132, 264, 429, 858, 1430, 2860, 4862, 9724, 16796, 33592, 58786, 117572, 208012, 416024, 742900, 1485800, 2674440, 5348880, 9694845, 19389690, 35357670, 70715340, 129644790, 259289580, 477638700]

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

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