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A252264 as a simple table

n a(n)
1 258
2 822
3 3016
4 10302
5 35486
6 122506
7 420420
8 1446744
9 4990438
10 17183040
11 59122262
12 203560110
13 701041422
14 2413836036
15 8310468310
16 28613117804
17 98520290558
18 339220390780
19 1167963347912
20 4021394031518
21 13846106821008

[258,822,3016,10302,35486,122506,420420,1446744,
 4990438,17183040,59122262,203560110,701041422,
 2413836036,8310468310,28613117804,98520290558,
 339220390780,1167963347912,4021394031518,
 13846106821008]

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Last modified May 23 10:05 EDT 2022. Contains 353975 sequences. (Running on oeis4.)