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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.

A247012 Consider the aliquot parts, in ascending order, of a composite number. Take their sum and repeat the process deleting the minimum number and adding the previous sum. The sequence lists the numbers that after some iterations reach a sum equal to the reverse of themselves.

Table of values

n a(n)
1 6
2 133
3 172
4 841
5 1005
6 1603
7 4258
8 5299
9 192901
10 498906
11 1633303
12 5307589
13 16333303
14 20671542
15 41673714
16 42999958
17 73687923

List of values

[6, 133, 172, 841, 1005, 1603, 4258, 5299, 192901, 498906, 1633303, 5307589, 16333303, 20671542, 41673714, 42999958, 73687923]

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

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