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.

A306668 Difference between numbers of binary bracketings of 0^0^...^0 with n 0's giving the result 1 and those giving the result 0, with conventions that 0^0=1^0=1^1=1, 0^1=0.

Table of values

n a(n)
0 0
1 -1
2 1
3 0
4 3
5 4
6 20
7 50
8 189
9 588
10 2100
11 7116
12 25344
13 89298
14 321178
15 1156298
16 4206059
17 15356796
18 56424836
19 208137800
20 771229684
21 2867771004
22 10700980956
23 40050890172
24 150328400292
25 565699287186
26 2133889856550
27 8067040670100
28 30559571239890
29 115986196679730

List of values

[0, -1, 1, 0, 3, 4, 20, 50, 189, 588, 2100, 7116, 25344, 89298, 321178, 1156298, 4206059, 15356796, 56424836, 208137800, 771229684, 2867771004, 10700980956, 40050890172, 150328400292, 565699287186, 2133889856550, 8067040670100, 30559571239890, 115986196679730]