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.

A378318 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(3*r+k,n)/(3*r+k) for k > 0.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 0
6 1
7 4
8 6
9 0
10 1
11 6
12 16
13 30
14 0
15 1
16 8
17 30
18 84
19 170
20 0
21 1
22 10
23 48
24 170
25 496
26 1050
27 0
28 1
29 12
30 70
31 296
32 1050
33 3140
34 6846
35 0
36 1
37 14
38 96
39 470
40 1920
41 6846
42 20832
43 46374
44 0
45 1
46 16
47 126
48 700
49 3210
50 12936
51 46374
52 142932
53 323154
54 0
55 1
56 18
57 160
58 994
59 5040
60 22402
61 89712
62 323154
63 1005856
64 2301618
65 0

List of values

[1, 1, 0, 1, 2, 0, 1, 4, 6, 0, 1, 6, 16, 30, 0, 1, 8, 30, 84, 170, 0, 1, 10, 48, 170, 496, 1050, 0, 1, 12, 70, 296, 1050, 3140, 6846, 0, 1, 14, 96, 470, 1920, 6846, 20832, 46374, 0, 1, 16, 126, 700, 3210, 12936, 46374, 142932, 323154, 0, 1, 18, 160, 994, 5040, 22402, 89712, 323154, 1005856, 2301618, 0]