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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.

A097341 a(n) = Sum_{k=0..floor(n/2)} Stirling2(n-k,k) * 2^k.

Table of values

n a(n)
0 1
1 0
2 2
3 2
4 6
5 14
6 38
7 110
8 342
9 1134
10 3990
11 14830
12 58006
13 237998
14 1021462
15 4574318
16 21325462
17 103287598
18 518768406
19 2697426926
20 14498316182
21 80440333998
22 460112203798
23 2710038058862
24 16418576767126
25 102212840258094
26 653247225514262
27 4282249051881198

List of values

[1, 0, 2, 2, 6, 14, 38, 110, 342, 1134, 3990, 14830, 58006, 237998, 1021462, 4574318, 21325462, 103287598, 518768406, 2697426926, 14498316182, 80440333998, 460112203798, 2710038058862, 16418576767126, 102212840258094, 653247225514262, 4282249051881198]

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

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