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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.

A064450 Sum of totients of binomial coefficients C(n,j), j=0..n.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 8
5 18
6 30
7 86
8 106
9 158
10 290
11 662
12 1410
13 3674
14 7166
15 16242
16 20242
17 46754
18 72910
19 162686
20 304866
21 524570
22 1179430
23 2842710
24 5230210
25 11035402
26 24478394
27 40473686
28 63927602
29 155016682
30 328928338
31 888801182
32 928681474
33 1765045802

List of values

[1, 2, 3, 6, 8, 18, 30, 86, 106, 158, 290, 662, 1410, 3674, 7166, 16242, 20242, 46754, 72910, 162686, 304866, 524570, 1179430, 2842710, 5230210, 11035402, 24478394, 40473686, 63927602, 155016682, 328928338, 888801182, 928681474, 1765045802]

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

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