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A035610 as a simple table

n a(n)
0 1
1 4
2 28
3 232
4 2092
5 19864
6 195352
7 1970896
8 20275660
9 211823800
10 2240795848
11 23951289520
12 258255469816
13 2805534253552
14 30675477376432
15 337306474674592
16 3727578443380492
17 41376874025687032
18 461121792658583272
19 5157384457905440752
20 57869888433073055272
21 651266142688270063312
22 7349148747954997832272

[1,4,28,232,2092,19864,195352,1970896,20275660,
 211823800,2240795848,23951289520,258255469816,
 2805534253552,30675477376432,337306474674592,
 3727578443380492,41376874025687032,
 461121792658583272,5157384457905440752,
 57869888433073055272,651266142688270063312,
 7349148747954997832272]

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)