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.

A331432 Triangle T(n,k) (n >= k >= 0) read by rows: T(n,0) = (1+(-1)^n)/2; for k>=1, set T(0,k) = 0, S(n,k) = binomial(n,k)*binomial(n+k+1,k), and for n>=1, T(n,k) = S(n,k)-T(n-1,k).

Table of values

n a(n)
0 1
1 0
2 3
3 1
4 5
5 10
6 0
7 10
8 35
9 35
10 1
11 14
12 91
13 189
14 126
15 0
16 21
17 189
18 651
19 924
20 462
21 1
22 27
23 351
24 1749
25 4026
26 4290
27 1716
28 0
29 36
30 594
31 4026
32 13299
33 22737
34 19305
35 6435
36 1
37 44
38 946
39 8294
40 36751
41 89375
42 120835
43 85085
44 24310
45 0
46 55
47 1430
48 15730
49 89375
50 289003
51 551837
52 615043
53 369512
54 92378
55 1
56 65
57 2080
58 27950
59 197275
60 811733
61 2047123
62 3203837
63 3031678
64 1587222
65 352716

List of values

[1, 0, 3, 1, 5, 10, 0, 10, 35, 35, 1, 14, 91, 189, 126, 0, 21, 189, 651, 924, 462, 1, 27, 351, 1749, 4026, 4290, 1716, 0, 36, 594, 4026, 13299, 22737, 19305, 6435, 1, 44, 946, 8294, 36751, 89375, 120835, 85085, 24310, 0, 55, 1430, 15730, 89375, 289003, 551837, 615043, 369512, 92378, 1, 65, 2080, 27950, 197275, 811733, 2047123, 3203837, 3031678, 1587222, 352716]