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.

A064638 Positions of non-crossing fixed-point-free involutions encoded by A014486 in A055089. Permutation of A064640.

Table of values

n a(n)
0 0
1 1
2 7
3 23
4 127
5 415
6 143
7 659
8 719
9 5167
10 16687
11 5455
12 26815
13 28495
14 5183
15 16703
16 5699
17 36899
18 38579
19 5759
20 36959
21 40031
22 40319
23 368047
24 1174447
25 379567
26 1901647
27 1992367
28 368335
29 1174735
30 389695
31 2627455
32 2718175
33 391375
34 2629135
35 2799055

List of values

[0, 1, 7, 23, 127, 415, 143, 659, 719, 5167, 16687, 5455, 26815, 28495, 5183, 16703, 5699, 36899, 38579, 5759, 36959, 40031, 40319, 368047, 1174447, 379567, 1901647, 1992367, 368335, 1174735, 389695, 2627455, 2718175, 391375, 2629135, 2799055]