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.

A329066 Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of ( (Sum_{j=0..n} x^(2*j+1)+1/x^(2*j+1)) * (Sum_{j=0..n} y^(2*j+1)+1/y^(2*j+1)) - (Sum_{j=0..n-1} x^(2*j+1)+1/x^(2*j+1)) * (Sum_{j=0..n-1} y^(2*j+1)+1/y^(2*j+1)) )^(2*k).

Table of values

n a(n)
0 1
1 4
2 1
3 36
4 12
5 1
6 400
7 588
8 20
9 1
10 4900
11 49440
12 2100
13 28
14 1
15 63504
16 5187980
17 423440
18 4956
19 36
20 1
21 853776
22 597027312
23 117234740
24 1751680
25 9540
26 44
27 1
28 11778624
29 71962945824
30 36938855520
31 907687900
32 5101200
33 16236
34 52
35 1

List of values

[1, 4, 1, 36, 12, 1, 400, 588, 20, 1, 4900, 49440, 2100, 28, 1, 63504, 5187980, 423440, 4956, 36, 1, 853776, 597027312, 117234740, 1751680, 9540, 44, 1, 11778624, 71962945824, 36938855520, 907687900, 5101200, 16236, 52, 1]