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.

A271699 Triangle read by rows, T(n,k) = Sum_{j=0..n} (-1)^(n-j)*C(-j,-n)*S1(k,j), S1 the Stirling cycle numbers A132393, for n>=0 and 0<=k<=n.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 2
6 0
7 1
8 3
9 9
10 0
11 1
12 4
13 14
14 58
15 0
16 1
17 5
18 20
19 90
20 475
21 0
22 1
23 6
24 27
25 131
26 729
27 4666
28 0
29 1
30 7
31 35
32 182
33 1064
34 7070
35 53116
36 0
37 1
38 8
39 44
40 244
41 1494
42 10284
43 79470
44 684762
45 0
46 1
47 9
48 54
49 318
50 2034
51 14478
52 114918
53 1012368
54 9833391

List of values

[1, 0, 1, 0, 1, 2, 0, 1, 3, 9, 0, 1, 4, 14, 58, 0, 1, 5, 20, 90, 475, 0, 1, 6, 27, 131, 729, 4666, 0, 1, 7, 35, 182, 1064, 7070, 53116, 0, 1, 8, 44, 244, 1494, 10284, 79470, 684762, 0, 1, 9, 54, 318, 2034, 14478, 114918, 1012368, 9833391]