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.

A000218 Take sum of squares of digits of previous term; start with 3.

Table of values

n a(n)
1 3
2 9
3 81
4 65
5 61
6 37
7 58
8 89
9 145
10 42
11 20
12 4
13 16
14 37
15 58
16 89
17 145
18 42
19 20
20 4
21 16
22 37
23 58
24 89
25 145
26 42
27 20
28 4
29 16
30 37
31 58
32 89
33 145
34 42
35 20
36 4
37 16
38 37
39 58
40 89
41 145
42 42
43 20
44 4
45 16
46 37
47 58
48 89
49 145
50 42
51 20
52 4
53 16
54 37
55 58
56 89
57 145
58 42
59 20
60 4
61 16
62 37
63 58
64 89
65 145
66 42
67 20
68 4
69 16
70 37

List of values

[3, 9, 81, 65, 61, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37, 58, 89, 145, 42, 20, 4, 16, 37]

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

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