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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.

A336031 Number of compositions of n such that the set of parts and the set of multiplicities of parts are equal.

Table of values

n a(n)
0 1
1 1
2 0
3 0
4 4
5 3
6 4
7 0
8 5
9 1
10 70
11 120
12 122
13 130
14 446
15 0
16 277
17 726
18 370
19 1064
20 13751
21 38913
22 41272
23 81168
24 137014
25 84448
26 300642
27 490540
28 517806
29 341033
30 1467180
31 425328
32 2403512
33 2916863
34 4455856
35 39855808
36 164203236
37 216675811
38 447273890
39 730795760
40 1154455982

List of values

[1, 1, 0, 0, 4, 3, 4, 0, 5, 1, 70, 120, 122, 130, 446, 0, 277, 726, 370, 1064, 13751, 38913, 41272, 81168, 137014, 84448, 300642, 490540, 517806, 341033, 1467180, 425328, 2403512, 2916863, 4455856, 39855808, 164203236, 216675811, 447273890, 730795760, 1154455982]

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

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