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.

A161943 Number of different equations that can be made by summing numbers from 1 to n and using every number not more than once.

Table of values

n a(n)
1 0
2 0
3 1
4 3
5 7
6 17
7 43
8 108
9 273
10 708
11 1867
12 4955
13 13256
14 35790
15 97340
16 266240
17 732014
18 2022558
19 5612579
20 15634288
21 43702232
22 122550885
23 344661924
24 971908613
25 2747404212
26 7784038617
27 22100387619
28 62869809733
29 179173559128
30 511497066733
31 1462522478549
32 4188024794407

List of values

[0, 0, 1, 3, 7, 17, 43, 108, 273, 708, 1867, 4955, 13256, 35790, 97340, 266240, 732014, 2022558, 5612579, 15634288, 43702232, 122550885, 344661924, 971908613, 2747404212, 7784038617, 22100387619, 62869809733, 179173559128, 511497066733, 1462522478549, 4188024794407]

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

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