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.

A058257 Triangle read by rows: this is a variant of A008280 in which 2 rows go from left to right, 2 from right to left, 2 from left to right, etc.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 0
5 1
6 1
7 1
8 1
9 0
10 3
11 2
12 1
13 0
14 0
15 0
16 3
17 5
18 6
19 6
20 6
21 0
22 0
23 3
24 8
25 14
26 20
27 26
28 71
29 71
30 71
31 68
32 60
33 46
34 26
35 0
36 413
37 342
38 271
39 200
40 132
41 72
42 26
43 0
44 0
45 0
46 413
47 755
48 1026
49 1226
50 1358
51 1430
52 1456
53 1456
54 1456
55 0
56 0
57 413
58 1168
59 2194
60 3420
61 4778
62 6208
63 7664
64 9120
65 10576

List of values

[1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 3, 2, 1, 0, 0, 0, 3, 5, 6, 6, 6, 0, 0, 3, 8, 14, 20, 26, 71, 71, 71, 68, 60, 46, 26, 0, 413, 342, 271, 200, 132, 72, 26, 0, 0, 0, 413, 755, 1026, 1226, 1358, 1430, 1456, 1456, 1456, 0, 0, 413, 1168, 2194, 3420, 4778, 6208, 7664, 9120, 10576]