cp's OEIS Frontend

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.

A357613 Triangle read by rows T(n, k) = binomial(2*n, k) * binomial(3*n - k, 2*n).

Table of values

n a(n)
0 1
1 3
2 2
3 15
4 20
5 6
6 84
7 168
8 105
9 20
10 495
11 1320
12 1260
13 504
14 70
15 3003
16 10010
17 12870
18 7920
19 2310
20 252
21 18564
22 74256
23 120120
24 100100
25 45045
26 10296
27 924
28 116280
29 542640
30 1058148
31 1113840
32 680680
33 240240
34 45045
35 3432

List of values

[1, 3, 2, 15, 20, 6, 84, 168, 105, 20, 495, 1320, 1260, 504, 70, 3003, 10010, 12870, 7920, 2310, 252, 18564, 74256, 120120, 100100, 45045, 10296, 924, 116280, 542640, 1058148, 1113840, 680680, 240240, 45045, 3432]

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

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