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.

A211608 Triangle T(n,k), 0 <= k <= n, given by (0, 1, 0, 2, 0, 3, 0, 4, 0, 5, ...) DELTA (1, 2, 3, 4, 5, 6, 7, 8, 9, ...) where DELTA is the operator defined in A084938.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 3
6 0
7 1
8 9
9 15
10 0
11 1
12 21
13 90
14 105
15 0
16 1
17 45
18 375
19 1050
20 945
21 0
22 1
23 93
24 1350
25 6825
26 14175
27 10395
28 0
29 1
30 189
31 4515
32 36750
33 132300
34 218295
35 135135
36 0
37 1
38 381
39 14490
40 178605
41 992250
42 2765070
43 3783780
44 2027025

List of values

[1, 0, 1, 0, 1, 3, 0, 1, 9, 15, 0, 1, 21, 90, 105, 0, 1, 45, 375, 1050, 945, 0, 1, 93, 1350, 6825, 14175, 10395, 0, 1, 189, 4515, 36750, 132300, 218295, 135135, 0, 1, 381, 14490, 178605, 992250, 2765070, 3783780, 2027025]