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.

A106243 Triangle read by rows from left to right. However, triangle is constructed in the boustrophedon way, reading alternately right to left and left to right. Top entry is 1. In all later rows, initial entry is 0, other entries are sum of previous entry in that row plus sum of two entries above it in previous row.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 1
5 0
6 0
7 2
8 3
9 3
10 13
11 13
12 11
13 6
14 0
15 0
16 26
17 50
18 67
19 73
20 73
21 505
22 505
23 479
24 403
25 286
26 146
27 0
28 0
29 1010
30 1994
31 2876
32 3565
33 3997
34 4143
35 4143
36 39313
37 39313
38 38303
39 35299
40 30429
41 23988
42 16426
43 8286
44 0
45 0
46 78626
47 156242
48 229844
49 295572
50 349989
51 390403

List of values

[1, 0, 1, 1, 1, 0, 0, 2, 3, 3, 13, 13, 11, 6, 0, 0, 26, 50, 67, 73, 73, 505, 505, 479, 403, 286, 146, 0, 0, 1010, 1994, 2876, 3565, 3997, 4143, 4143, 39313, 39313, 38303, 35299, 30429, 23988, 16426, 8286, 0, 0, 78626, 156242, 229844, 295572, 349989, 390403]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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