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.

A045545 a(0) = 1; a(n) = Sum_{0 <= k < n and gcd(k,n) = 1} a(k).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 7
6 8
7 22
8 32
9 66
10 91
11 233
12 263
13 729
14 1038
15 2059
16 3119
17 7674
18 8666
19 24014
20 32741
21 68645
22 103219
23 252633
24 285313
25 755681
26 1111037
27 2292275
28 3335374
29 8284946
30 8570252
31 25140144
32 36829131
33 75778418
34 112599875
35 262721802

List of values

[1, 1, 1, 2, 3, 7, 8, 22, 32, 66, 91, 233, 263, 729, 1038, 2059, 3119, 7674, 8666, 24014, 32741, 68645, 103219, 252633, 285313, 755681, 1111037, 2292275, 3335374, 8284946, 8570252, 25140144, 36829131, 75778418, 112599875, 262721802]