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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.

A193451 Triangle of a binomial convolution sum related to Jacobsthal numbers.

Table of values

n a(n)
0 0
1 0
2 1
3 0
4 3
5 3
6 0
7 5
8 8
9 2
10 0
11 7
12 17
13 14
14 6
15 0
16 9
17 30
18 39
19 24
20 3
21 0
22 11
23 47
24 83
25 75
26 33
27 9
28 0
29 13
30 68
31 152
32 184
33 126
34 48
35 4
36 0
37 15
38 93
39 252
40 384
41 354
42 198
43 60
44 12
45 0
46 17
47 122
48 389
49 716
50 830
51 620
52 290
53 80
54 5
55 0
56 19
57 155
58 569
59 1229
60 1718
61 1610
62 1010
63 410
64 95
65 15

List of values

[0, 0, 1, 0, 3, 3, 0, 5, 8, 2, 0, 7, 17, 14, 6, 0, 9, 30, 39, 24, 3, 0, 11, 47, 83, 75, 33, 9, 0, 13, 68, 152, 184, 126, 48, 4, 0, 15, 93, 252, 384, 354, 198, 60, 12, 0, 17, 122, 389, 716, 830, 620, 290, 80, 5, 0, 19, 155, 569, 1229, 1718, 1610, 1010, 410, 95, 15]