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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.

A243149 Number of compositions of n such that the sum of the parts counted without multiplicities is equal to the sum of all multiplicities.

Table of values

n a(n)
0 1
1 1
2 0
3 0
4 4
5 3
6 4
7 0
8 11
9 31
10 70
11 177
12 242
13 382
14 482
15 874
16 1655
17 4440
18 10696
19 24390
20 49867
21 95850
22 172980
23 289229
24 492233
25 811753
26 1468084
27 2813206
28 5929361
29 12780690
30 27858421
31 59275097
32 122326098
33 243179349
34 467856049
35 873044584
36 1588187110
37 2842593612

List of values

[1, 1, 0, 0, 4, 3, 4, 0, 11, 31, 70, 177, 242, 382, 482, 874, 1655, 4440, 10696, 24390, 49867, 95850, 172980, 289229, 492233, 811753, 1468084, 2813206, 5929361, 12780690, 27858421, 59275097, 122326098, 243179349, 467856049, 873044584, 1588187110, 2842593612]

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

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