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.

A355341 G.f.: A(x) = Sum_{n=-oo..+oo} x^(n*(n+1)/2) * C(x)^n, where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108).

Table of values

n a(n)
0 2
1 1
2 -2
3 1
4 -3
5 0
6 1
7 -4
8 2
9 0
10 1
11 -5
12 5
13 0
14 0
15 1
16 -6
17 9
18 -2
19 0
20 0
21 1
22 -7
23 14
24 -7
25 0
26 0
27 0
28 1
29 -8
30 20
31 -16
32 2
33 0
34 0
35 0
36 1
37 -9
38 27
39 -30
40 9
41 0
42 0
43 0
44 0
45 1
46 -10
47 35
48 -50
49 25
50 -2
51 0
52 0
53 0
54 0
55 1
56 -11
57 44
58 -77
59 55
60 -11
61 0
62 0
63 0
64 0
65 0
66 1
67 -12
68 54
69 -112
70 105
71 -36
72 2
73 0
74 0
75 0
76 0
77 0
78 1
79 -13
80 65
81 -156
82 182
83 -91
84 13
85 0
86 0
87 0
88 0
89 0
90 0
91 1
92 -14
93 77
94 -210
95 294
96 -196
97 49
98 -2
99 0
100 0
101 0
102 0
103 0
104 0
105 1
106 -15
107 90
108 -275
109 450
110 -378
111 140
112 -15
113 0
114 0
115 0
116 0
117 0
118 0
119 0

List of values

[2, 1, -2, 1, -3, 0, 1, -4, 2, 0, 1, -5, 5, 0, 0, 1, -6, 9, -2, 0, 0, 1, -7, 14, -7, 0, 0, 0, 1, -8, 20, -16, 2, 0, 0, 0, 1, -9, 27, -30, 9, 0, 0, 0, 0, 1, -10, 35, -50, 25, -2, 0, 0, 0, 0, 1, -11, 44, -77, 55, -11, 0, 0, 0, 0, 0, 1, -12, 54, -112, 105, -36, 2, 0, 0, 0, 0, 0, 1, -13, 65, -156, 182, -91, 13, 0, 0, 0, 0, 0, 0, 1, -14, 77, -210, 294, -196, 49, -2, 0, 0, 0, 0, 0, 0, 1, -15, 90, -275, 450, -378, 140, -15, 0, 0, 0, 0, 0, 0, 0]