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.

A204273 a(n) = sigma_3(n)*Pell(n), where sigma_3(n) = A001158(n), the sum of cubes of divisors of n.

Table of values

n a(n)
1 1
2 18
3 140
4 876
5 3654
6 17640
7 58136
8 238680
9 745645
10 2696652
11 7647012
12 28329840
13 73547278
14 250101072
15 688048200
16 2203964592
17 5585689746
18 18696302730
19 45448247740
20 147116748744
21 371929710880
22 1117549627704
23 2738514030408
24 8899904613600

List of values

[1, 18, 140, 876, 3654, 17640, 58136, 238680, 745645, 2696652, 7647012, 28329840, 73547278, 250101072, 688048200, 2203964592, 5585689746, 18696302730, 45448247740, 147116748744, 371929710880, 1117549627704, 2738514030408, 8899904613600]

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

Content is available under The OEIS End-User License Agreement.