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.

A079219 Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=0, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the three-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 0
5 1
6 3
7 1
8 3
9 1
10 8
11 0
12 9
13 0
14 1
15 18
16 2
17 22
18 0
19 0
20 1
21 43
22 0
23 60
24 0
25 0
26 0
27 1
28 104
29 5
30 159
31 1
32 0
33 3
34 0
35 1
36 273
37 0
38 428
39 0
40 0
41 0
42 0
43 0
44 1
45 702
46 14
47 1143
48 0
49 1
50 9
51 0
52 0
53 0
54 1
55 1870
56 0
57 3114
58 0
59 0
60 0
61 0
62 0
63 0
64 0
65 1
66 4985
67 38
68 8505
69 2
70 0
71 28
72 0
73 0
74 3
75 0
76 0
77 1
78 13562
79 0
80 23475
81 0
82 0
83 0
84 0

List of values

[1, 1, 1, 2, 0, 1, 3, 1, 3, 1, 8, 0, 9, 0, 1, 18, 2, 22, 0, 0, 1, 43, 0, 60, 0, 0, 0, 1, 104, 5, 159, 1, 0, 3, 0, 1, 273, 0, 428, 0, 0, 0, 0, 0, 1, 702, 14, 1143, 0, 1, 9, 0, 0, 0, 1, 1870, 0, 3114, 0, 0, 0, 0, 0, 0, 0, 1, 4985, 38, 8505, 2, 0, 28, 0, 0, 3, 0, 0, 1, 13562, 0, 23475, 0, 0, 0, 0]