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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.

A355339 a(n) is the number of central even terms in the n-th row of triangle A355320; a(0) = 0.

Table of values

n a(n)
0 0
1 3
2 1
3 3
4 3
5 7
6 1
7 3
8 5
9 3
10 5
11 11
12 3
13 11
14 1
15 3
16 5
17 7
18 7
19 3
20 5
21 7
22 9
23 19
24 7
25 3
26 5
27 19
28 3
29 11
30 1
31 3
32 5
33 7
34 9
35 11
36 13
37 11
38 7
39 3
40 5
41 7
42 9
43 11
44 13
45 15
46 17
47 35
48 15
49 11
50 7
51 3
52 5
53 7
54 9
55 35
56 7
57 3
58 5
59 19
60 3
61 11
62 1
63 3
64 5
65 7
66 9
67 11
68 13
69 15
70 17
71 19
72 21
73 23
74 23
75 19
76 15

List of values

[0, 3, 1, 3, 3, 7, 1, 3, 5, 3, 5, 11, 3, 11, 1, 3, 5, 7, 7, 3, 5, 7, 9, 19, 7, 3, 5, 19, 3, 11, 1, 3, 5, 7, 9, 11, 13, 11, 7, 3, 5, 7, 9, 11, 13, 15, 17, 35, 15, 11, 7, 3, 5, 7, 9, 35, 7, 3, 5, 19, 3, 11, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 23, 19, 15]

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

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