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A207512 as a simple table

n a(n)
1 18
2 324
3 660
4 1992
5 5334
6 10340
7 22960
8 46826
9 94601
10 192192
11 375592
12 746568
13 1463672
14 2848131
15 5567402
16 10787309
17 20928995
18 40520266
19 78275905
20 151304457
21 291889743
22 563242937
23 1086277275
24 2094265839
25 4038763494
26 7785977121

[18,324,660,1992,5334,10340,22960,46826,94601,
 192192,375592,746568,1463672,2848131,5567402,
 10787309,20928995,40520266,78275905,151304457,
 291889743,563242937,1086277275,2094265839,
 4038763494,7785977121]

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Last modified June 1 20:24 EDT 2023. Contains 363078 sequences. (Running on oeis4.)