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A035599 as a simple table

n a(n)
0 0
1 2
2 20
3 102
4 360
5 1002
6 2364
7 4942
8 9424
9 16722
10 28004
11 44726
12 68664
13 101946
14 147084
15 207006
16 285088
17 385186
18 511668
19 669446
20 864008
21 1101450
22 1388508
23 1732590
24 2141808
25 2625010
26 3191812
27 3852630
28 4618712
29 5502170
30 6516012

[0,2,20,102,360,1002,2364,4942,9424,16722,28004,
 44726,68664,101946,147084,207006,285088,385186,
 511668,669446,864008,1101450,1388508,1732590,
 2141808,2625010,3191812,3852630,4618712,5502170,
 6516012]

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Last modified August 3 20:08 EDT 2020. Contains 336201 sequences. (Running on oeis4.)