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.

A338415 Triangle read by rows: T(n,m) = C(n+m+1,n)*C(2*n-m,n)*C(3*n+1,n)*C(4*n+2,2*m+1)/(2*(n+1)*C(2*n,n)*C(2*n+2*m+2,2*n)).

Table of values

n a(n)
0 1
1 2
2 2
3 7
4 18
5 7
6 30
7 130
8 130
9 30
10 143
11 884
12 1530
13 884
14 143
15 728
16 5880
17 14896
18 14896
19 5880
20 728
21 3876
22 38760
23 131100
24 193200
25 131100
26 38760
27 3876
28 21318
29 254562
30 1085238
31 2153250
32 2153250
33 1085238
34 254562
35 21318
36 120175
37 1669800
38 8627300
39 21755800
40 29370330
41 21755800
42 8627300
43 1669800
44 120175

List of values

[1, 2, 2, 7, 18, 7, 30, 130, 130, 30, 143, 884, 1530, 884, 143, 728, 5880, 14896, 14896, 5880, 728, 3876, 38760, 131100, 193200, 131100, 38760, 3876, 21318, 254562, 1085238, 2153250, 2153250, 1085238, 254562, 21318, 120175, 1669800, 8627300, 21755800, 29370330, 21755800, 8627300, 1669800, 120175]