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.

A255891 Numbers n such that the sum of the even divisors of n is equal to m! and the sum of the odd divisors of n is equal to k! for some integers m and k.

Table of values

n a(n)
1 2
2 4
3 240
4 348
5 368
6 380
7 19364665320
8 20210069880
9 20328267960
10 20673770040
11 20681420760
12 20735165880
13 20940748920
14 20959618680
15 21135474360
16 21196014840
17 21256222680
18 21302746920
19 21380630040
20 21405023640
21 21426252120
22 21465896760
23 21522002040
24 21544621560

List of values

[2, 4, 240, 348, 368, 380, 19364665320, 20210069880, 20328267960, 20673770040, 20681420760, 20735165880, 20940748920, 20959618680, 21135474360, 21196014840, 21256222680, 21302746920, 21380630040, 21405023640, 21426252120, 21465896760, 21522002040, 21544621560]

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

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