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.

A291709 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f.: exp(Sum_{j>=1} (-1)^(j-1)*binomial(-k,j-1)*x^j/j).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 3
13 6
14 1
15 1
16 1
17 4
18 13
19 24
20 1
21 1
22 1
23 5
24 22
25 73
26 120
27 1
28 1
29 1
30 6
31 33
32 154
33 501
34 720
35 1
36 1
37 1
38 7
39 46
40 273
41 1306
42 4051
43 5040
44 1
45 1
46 1
47 8
48 61
49 436
50 2721
51 12976
52 37633
53 40320
54 1
55 1
56 1
57 9
58 78
59 649
60 4956
61 31701
62 147484
63 394353
64 362880
65 1

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 6, 1, 1, 1, 4, 13, 24, 1, 1, 1, 5, 22, 73, 120, 1, 1, 1, 6, 33, 154, 501, 720, 1, 1, 1, 7, 46, 273, 1306, 4051, 5040, 1, 1, 1, 8, 61, 436, 2721, 12976, 37633, 40320, 1, 1, 1, 9, 78, 649, 4956, 31701, 147484, 394353, 362880, 1]