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.

A264773 Triangle T(n,k) = binomial(4*n - 3*k, 3*n - 2*k), 0 <= k <= n.

Table of values

n a(n)
0 1
1 4
2 1
3 28
4 5
5 1
6 220
7 36
8 6
9 1
10 1820
11 286
12 45
13 7
14 1
15 15504
16 2380
17 364
18 55
19 8
20 1
21 134596
22 20349
23 3060
24 455
25 66
26 9
27 1
28 1184040
29 177100
30 26334
31 3876
32 560
33 78
34 10
35 1
36 10518300
37 1560780
38 230230
39 33649
40 4845
41 680
42 91
43 11
44 1
45 94143280
46 13884156
47 2035800
48 296010
49 42504
50 5985
51 816
52 105
53 12
54 1

List of values

[1, 4, 1, 28, 5, 1, 220, 36, 6, 1, 1820, 286, 45, 7, 1, 15504, 2380, 364, 55, 8, 1, 134596, 20349, 3060, 455, 66, 9, 1, 1184040, 177100, 26334, 3876, 560, 78, 10, 1, 10518300, 1560780, 230230, 33649, 4845, 680, 91, 11, 1, 94143280, 13884156, 2035800, 296010, 42504, 5985, 816, 105, 12, 1]

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

Content is available under The OEIS End-User License Agreement.