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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.

A387109 Number of entries in the n-th row of Pascal's triangle not divisible by 27.

Table of values

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

List of values

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 10, 20, 30, 19, 26, 33, 28, 32, 36, 25, 32, 39, 32, 37, 42, 39, 42, 45, 40, 44, 48, 45, 48, 51, 50, 52, 54, 19, 38, 57, 34, 47, 60, 49, 56, 63, 40, 53, 66, 51, 60]

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

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