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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.

A210042 Triangle of coefficients of polynomials u(n,x) jointly generated with A124927; see the Formula section.

Table of values

n a(n)
1 1
2 3
3 5
4 2
5 7
6 6
7 2
8 9
9 12
10 8
11 2
12 11
13 20
14 20
15 10
16 2
17 13
18 30
19 40
20 30
21 12
22 2
23 15
24 42
25 70
26 70
27 42
28 14
29 2
30 17
31 56
32 112
33 140
34 112
35 56
36 16
37 2
38 19
39 72
40 168
41 252
42 252
43 168
44 72
45 18
46 2
47 21
48 90
49 240
50 420
51 504
52 420
53 240
54 90
55 20
56 2
57 23
58 110
59 330
60 660
61 924
62 924
63 660
64 330
65 110

List of values

[1, 3, 5, 2, 7, 6, 2, 9, 12, 8, 2, 11, 20, 20, 10, 2, 13, 30, 40, 30, 12, 2, 15, 42, 70, 70, 42, 14, 2, 17, 56, 112, 140, 112, 56, 16, 2, 19, 72, 168, 252, 252, 168, 72, 18, 2, 21, 90, 240, 420, 504, 420, 240, 90, 20, 2, 23, 110, 330, 660, 924, 924, 660, 330, 110]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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