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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.

A370419 A(n, k) = 2^n*Pochhammer(k/2, n). Square array read by ascending antidiagonals.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 1
6 0
7 3
8 2
9 1
10 0
11 15
12 8
13 3
14 1
15 0
16 105
17 48
18 15
19 4
20 1
21 0
22 945
23 384
24 105
25 24
26 5
27 1
28 0
29 10395
30 3840
31 945
32 192
33 35
34 6
35 1
36 0
37 135135
38 46080
39 10395
40 1920
41 315
42 48
43 7
44 1
45 0
46 2027025
47 645120
48 135135
49 23040
50 3465
51 480
52 63
53 8
54 1

List of values

[1, 0, 1, 0, 1, 1, 0, 3, 2, 1, 0, 15, 8, 3, 1, 0, 105, 48, 15, 4, 1, 0, 945, 384, 105, 24, 5, 1, 0, 10395, 3840, 945, 192, 35, 6, 1, 0, 135135, 46080, 10395, 1920, 315, 48, 7, 1, 0, 2027025, 645120, 135135, 23040, 3465, 480, 63, 8, 1]