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A103897 as a simple table

n a(n)
1 3
2 18
3 84
4 360
5 1488
6 6048
7 24384
8 97920
9 392448
10 1571328
11 6288384
12 25159680
13 100651008
14 402628608
15 1610563584
16 6442352640
17 25769607168
18 103078821888
19 412316073984
20 1649265868800
21 6597066620928
22 26388272775168
23 105553103683584
24 422212439900160

[3,18,84,360,1488,6048,24384,97920,392448,1571328,
 6288384,25159680,100651008,402628608,1610563584,
 6442352640,25769607168,103078821888,412316073984,
 1649265868800,6597066620928,26388272775168,
 105553103683584,422212439900160]

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Last modified April 25 05:56 EDT 2024. Contains 371964 sequences. (Running on oeis4.)