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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.

A171379 Triangle, read by rows, T(n, k) = A059481(n,k)*(A059481(n,k) - 1)/2.

Table of values

n a(n)
1 0
2 1
3 3
4 3
5 15
6 45
7 6
8 45
9 190
10 595
11 10
12 105
13 595
14 2415
15 7875
16 15
17 210
18 1540
19 7875
20 31626
21 106491
22 21
23 378
24 3486
25 21945
26 106491
27 426426
28 1471470
29 28
30 630
31 7140
32 54285
33 313236
34 1471470
35 5887596
36 20701395
37 36
38 990
39 13530
40 122265
41 827541
42 4507503
43 20701395
44 82812015
45 295475895

List of values

[0, 1, 3, 3, 15, 45, 6, 45, 190, 595, 10, 105, 595, 2415, 7875, 15, 210, 1540, 7875, 31626, 106491, 21, 378, 3486, 21945, 106491, 426426, 1471470, 28, 630, 7140, 54285, 313236, 1471470, 5887596, 20701395, 36, 990, 13530, 122265, 827541, 4507503, 20701395, 82812015, 295475895]

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

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