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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.

A381713 a(n) = J_9(n)/J_3(n), where J_k is the k-th Jordan totient function.

Table of values

n a(n)
1 1
2 73
3 757
4 4672
5 15751
6 55261
7 117993
8 299008
9 551853
10 1149823
11 1772893
12 3536704
13 4829007
14 8613489
15 11923507
16 19136512
17 24142483
18 40285269
19 47052741
20 73588672
21 89320701
22 129421189
23 148048057
24 226349056
25 246109375
26 352517511
27 402300837
28 551263296

List of values

[1, 73, 757, 4672, 15751, 55261, 117993, 299008, 551853, 1149823, 1772893, 3536704, 4829007, 8613489, 11923507, 19136512, 24142483, 40285269, 47052741, 73588672, 89320701, 129421189, 148048057, 226349056, 246109375, 352517511, 402300837, 551263296]

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

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