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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.

A222057 Triangle read by rows: coefficients of harmonic-geometric polynomials.

Table of values

n a(n)
1 1
2 1
3 3
4 1
5 9
6 11
7 1
8 21
9 66
10 50
11 1
12 45
13 275
14 500
15 274
16 1
17 93
18 990
19 3250
20 4110
21 1764
22 1
23 189
24 3311
25 17500
26 38360
27 37044
28 13068
29 1
30 381
31 10626
32 85050
33 287700
34 469224
35 365904
36 109584
37 1
38 765
39 33275
40 388500
41 1904574
42 4667544
43 6037416
44 3945024
45 1026576
46 1
47 1533
48 102630
49 1705250
50 11651850
51 40266828
52 76839840
53 82188000
54 46195920
55 10628640

List of values

[1, 1, 3, 1, 9, 11, 1, 21, 66, 50, 1, 45, 275, 500, 274, 1, 93, 990, 3250, 4110, 1764, 1, 189, 3311, 17500, 38360, 37044, 13068, 1, 381, 10626, 85050, 287700, 469224, 365904, 109584, 1, 765, 33275, 388500, 1904574, 4667544, 6037416, 3945024, 1026576, 1, 1533, 102630, 1705250, 11651850, 40266828, 76839840, 82188000, 46195920, 10628640]

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

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