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.

A205497 Triangle read by rows: Zig-zag Eulerian number triangle T(n, k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 3
7 1
8 1
9 7
10 7
11 1
12 1
13 14
14 31
15 14
16 1
17 1
18 26
19 109
20 109
21 26
22 1
23 1
24 46
25 334
26 623
27 334
28 46
29 1
30 1
31 79
32 937
33 2951
34 2951
35 937
36 79
37 1
38 1
39 133
40 2475
41 12331
42 20641
43 12331
44 2475
45 133
46 1
47 1
48 221
49 6267
50 47191
51 123216
52 123216
53 47191
54 6267
55 221
56 1

List of values

[1, 1, 1, 1, 1, 1, 3, 1, 1, 7, 7, 1, 1, 14, 31, 14, 1, 1, 26, 109, 109, 26, 1, 1, 46, 334, 623, 334, 46, 1, 1, 79, 937, 2951, 2951, 937, 79, 1, 1, 133, 2475, 12331, 20641, 12331, 2475, 133, 1, 1, 221, 6267, 47191, 123216, 123216, 47191, 6267, 221, 1]