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.

A058545 Trajectory of 23 under map that sends x to 3x - sigma(x), where sigma(x) is the sum of the divisors of x.

Table of values

n a(n)
0 23
1 45
2 57
3 91
4 161
5 291
6 481
7 911
8 1821
9 3031
10 5621
11 9759
12 16261
13 29199
14 48661
15 97321
16 180731
17 361461
18 595359
19 914661
20 1302543
21 1810989
22 2732295
23 3594645
24 4393215
25 5513805
26 5482215
27 6700245
28 8913663
29 12588669
30 19116087
31 31171125

List of values

[23, 45, 57, 91, 161, 291, 481, 911, 1821, 3031, 5621, 9759, 16261, 29199, 48661, 97321, 180731, 361461, 595359, 914661, 1302543, 1810989, 2732295, 3594645, 4393215, 5513805, 5482215, 6700245, 8913663, 12588669, 19116087, 31171125]

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

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