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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.

A046217 First numerator and then denominator of 1/2-Pascal triangle (by row) excluding 1's and 2's.

Table of values

n a(n)
1 3
2 3
3 5
4 3
5 5
6 7
7 11
8 11
9 7
10 9
11 9
12 11
13 9
14 9
15 11
16 27
17 20
18 20
19 27
20 11
21 13
22 19
23 67
24 40
25 67
26 19
27 13
28 15
29 51
30 105
31 147
32 147
33 105
34 51
35 15
36 17
37 33
38 78
39 126
40 147
41 126
42 78
43 33
44 17
45 19
46 83
47 111
48 204
49 273
50 273
51 204
52 111
53 83
54 19
55 21
56 51
57 305
58 315
59 477
60 546
61 477
62 315
63 305
64 51
65 21
66 23

List of values

[3, 3, 5, 3, 5, 7, 11, 11, 7, 9, 9, 11, 9, 9, 11, 27, 20, 20, 27, 11, 13, 19, 67, 40, 67, 19, 13, 15, 51, 105, 147, 147, 105, 51, 15, 17, 33, 78, 126, 147, 126, 78, 33, 17, 19, 83, 111, 204, 273, 273, 204, 111, 83, 19, 21, 51, 305, 315, 477, 546, 477, 315, 305, 51, 21, 23]

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

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