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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.

A064307 Triangle of coefficients of certain numerator polynomials N(n,x).

Table of values

n a(n)
1 1
2 1
3 0
4 1
5 2
6 1
7 1
8 10
9 17
10 2
11 1
12 37
13 181
14 111
15 6
16 1
17 126
18 1530
19 2624
20 741
21 18
22 1
23 422
24 11607
25 43940
26 34063
27 4950
28 57
29 1
30 1422
31 83823
32 616894
33 1013799
34 412698
35 33337
36 186
37 1
38 4853
39 593203
40 7846573
41 23794925

List of values

[1, 1, 0, 1, 2, 1, 1, 10, 17, 2, 1, 37, 181, 111, 6, 1, 126, 1530, 2624, 741, 18, 1, 422, 11607, 43940, 34063, 4950, 57, 1, 1422, 83823, 616894, 1013799, 412698, 33337, 186, 1, 4853, 593203, 7846573, 23794925]