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.

A340556 E2(n, k), the second-order Eulerian numbers with E2(0, k) = δ_{0, k}. Triangle read by rows, E2(n, k) for 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 8
9 6
10 0
11 1
12 22
13 58
14 24
15 0
16 1
17 52
18 328
19 444
20 120
21 0
22 1
23 114
24 1452
25 4400
26 3708
27 720
28 0
29 1
30 240
31 5610
32 32120
33 58140
34 33984
35 5040
36 0
37 1
38 494
39 19950
40 195800
41 644020
42 785304
43 341136
44 40320
45 0
46 1
47 1004
48 67260
49 1062500
50 5765500
51 12440064
52 11026296
53 3733920
54 362880

List of values

[1, 0, 1, 0, 1, 2, 0, 1, 8, 6, 0, 1, 22, 58, 24, 0, 1, 52, 328, 444, 120, 0, 1, 114, 1452, 4400, 3708, 720, 0, 1, 240, 5610, 32120, 58140, 33984, 5040, 0, 1, 494, 19950, 195800, 644020, 785304, 341136, 40320, 0, 1, 1004, 67260, 1062500, 5765500, 12440064, 11026296, 3733920, 362880]