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A293881 Number T(n,k) of linear chord diagrams having n chords and minimal chord length k (or k=0 if n=0); triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 2
5 1
6 0
7 10
8 4
9 1
10 0
11 69
12 26
13 9
14 1
15 0
16 616
17 230
18 79
19 19
20 1
21 0
22 6740
23 2509
24 854
25 252
26 39
27 1
28 0
29 87291
30 32422
31 11105
32 3441
33 796
34 79
35 1
36 0
37 1305710
38 484180
39 167273
40 52938
41 14296
42 2468
43 159
44 1
45 0
46 22149226
47 8203519
48 2855096
49 919077
50 265103
51 59520
52 7564
53 319
54 1

List of values

[1, 0, 1, 0, 2, 1, 0, 10, 4, 1, 0, 69, 26, 9, 1, 0, 616, 230, 79, 19, 1, 0, 6740, 2509, 854, 252, 39, 1, 0, 87291, 32422, 11105, 3441, 796, 79, 1, 0, 1305710, 484180, 167273, 52938, 14296, 2468, 159, 1, 0, 22149226, 8203519, 2855096, 919077, 265103, 59520, 7564, 319, 1]