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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.

A357904 a(n) = Sum_{k=0..floor(n/4)} Stirling2(n - 3*k,k).

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 2
9 4
10 8
11 16
12 33
13 70
14 153
15 346
16 814
17 2000
18 5138
19 13776
20 38395
21 110695
22 328638
23 1001306
24 3124626
25 9978906
26 32620854
27 109225582
28 374875483
29 1319392590
30 4761630252
31 17610041358
32 66668257846
33 258018795970
34 1019440760020
35 4106982942054

List of values

[1, 0, 0, 0, 1, 1, 1, 1, 2, 4, 8, 16, 33, 70, 153, 346, 814, 2000, 5138, 13776, 38395, 110695, 328638, 1001306, 3124626, 9978906, 32620854, 109225582, 374875483, 1319392590, 4761630252, 17610041358, 66668257846, 258018795970, 1019440760020, 4106982942054]

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

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