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.

A381228 Smallest k such that n appears in row k of the triangle in A381227, or -1 if n never appears in A381227.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 4
6 3
7 10
8 7
9 7
10 5
11 5
12 12
13 12
14 8
15 8
16 13
17 13
18 21
19 36
20 22
21 22
22 37
23 14
24 4
25 9
26 6
27 6
28 39
29 39
30 24
31 24
32 15
33 15
34 69
35 41
36 41
37 25
38 25
39 42
40 42
41 72
42 72
43 10
44 10
45 43
46 16
47 16
48 74
49 128
50 44
51 44
52 75
53 130
54 76
55 76
56 27
57 27
58 77
59 77
60 134
61 134
62 78
63 46
64 46
65 17
66 17
67 79
68 79
69 28

List of values

[1, 2, 3, 4, 4, 3, 10, 7, 7, 5, 5, 12, 12, 8, 8, 13, 13, 21, 36, 22, 22, 37, 14, 4, 9, 6, 6, 39, 39, 24, 24, 15, 15, 69, 41, 41, 25, 25, 42, 42, 72, 72, 10, 10, 43, 16, 16, 74, 128, 44, 44, 75, 130, 76, 76, 27, 27, 77, 77, 134, 134, 78, 46, 46, 17, 17, 79, 79, 28]

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

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