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.

A191239 Triangle T(n,k) = coefficient of x^n in expansion of (x+x^2+2*x^3)^k.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 1
7 0
8 5
9 3
10 1
11 0
12 4
13 9
14 4
15 1
16 0
17 4
18 13
19 14
20 5
21 1
22 0
23 0
24 18
25 28
26 20
27 6
28 1
29 0
30 0
31 12
32 49
33 50
34 27
35 7
36 1
37 0
38 0
39 8
40 56
41 105
42 80
43 35
44 8
45 1
46 0
47 0
48 0
49 56
50 161
51 195
52 119
53 44
54 9
55 1
56 0
57 0
58 0
59 32
60 210
61 366
62 329
63 168
64 54
65 10
66 1
67 0
68 0
69 0
70 16
71 200
72 581
73 721
74 518
75 228
76 65
77 11
78 1
79 0
80 0
81 0
82 0
83 160
84 732
85 1337
86 1288
87 774
88 300
89 77
90 12
91 1
92 0
93 0
94 0
95 0
96 80
97 780
98 2045
99 2716
100 2142
101 1110
102 385
103 90
104 13
105 1

List of values

[1, 1, 1, 2, 2, 1, 0, 5, 3, 1, 0, 4, 9, 4, 1, 0, 4, 13, 14, 5, 1, 0, 0, 18, 28, 20, 6, 1, 0, 0, 12, 49, 50, 27, 7, 1, 0, 0, 8, 56, 105, 80, 35, 8, 1, 0, 0, 0, 56, 161, 195, 119, 44, 9, 1, 0, 0, 0, 32, 210, 366, 329, 168, 54, 10, 1, 0, 0, 0, 16, 200, 581, 721, 518, 228, 65, 11, 1, 0, 0, 0, 0, 160, 732, 1337, 1288, 774, 300, 77, 12, 1, 0, 0, 0, 0, 80, 780, 2045, 2716, 2142, 1110, 385, 90, 13, 1]