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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.

A264774 Triangle T(n,k) = binomial(5*n - 4*k, 4*n - 3*k), 0 <= k <= n.

Table of values

n a(n)
0 1
1 5
2 1
3 45
4 6
5 1
6 455
7 55
8 7
9 1
10 4845
11 560
12 66
13 8
14 1
15 53130
16 5985
17 680
18 78
19 9
20 1
21 593775
22 65780
23 7315
24 816
25 91
26 10
27 1
28 6724520
29 736281
30 80730
31 8855
32 969
33 105
34 11
35 1
36 76904685
37 8347680
38 906192
39 98280
40 10626
41 1140
42 120
43 12
44 1
45 886163135
46 95548245
47 10295472
48 1107568
49 118755
50 12650
51 1330
52 136
53 13
54 1

List of values

[1, 5, 1, 45, 6, 1, 455, 55, 7, 1, 4845, 560, 66, 8, 1, 53130, 5985, 680, 78, 9, 1, 593775, 65780, 7315, 816, 91, 10, 1, 6724520, 736281, 80730, 8855, 969, 105, 11, 1, 76904685, 8347680, 906192, 98280, 10626, 1140, 120, 12, 1, 886163135, 95548245, 10295472, 1107568, 118755, 12650, 1330, 136, 13, 1]

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

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