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A098817 as a simple table

n a(n)
1 2
2 18
3 72
4 780
5 228
6 852
7 228
8 1080
9 4020
10 25800
11 6012
12 40332
13 713502
14 332880
15 455892
16 6428118
17 4142652
18 173808 

[2,18,72,780,228,852,228,1080,4020,25800,6012,
 40332,713502,332880,455892,6428118,4142652,173808]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)