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A000529 as a simple table

n a(n)
1 20
2 74
3 186
4 388
5 721
6 1236
7 1995
8 3072
9 4554
10 6542
11 9152
12 12516
13 16783
14 22120
15 28713
16 36768
17 46512
18 58194
19 72086
20 88484
21 107709
22 130108
23 156055
24 185952
25 220230
26 259350
27 303804
28 354116
29 410843
30 474576
31 545941
32 625600
33 714252
34 812634
35 921522
36 1041732
37 1174121
38 1319588
39 1479075
40 1653568
41 1844098
42 2051742
43 2277624
44 2522916
45 2788839
46 3076664
47 3387713
48 3723360
49 4085032
50 4474210

[20,74,186,388,721,1236,1995,3072,4554,6542,9152,
 12516,16783,22120,28713,36768,46512,58194,72086,
 88484,107709,130108,156055,185952,220230,259350,
 303804,354116,410843,474576,545941,625600,714252,
 812634,921522,1041732,1174121,1319588,1479075,
 1653568,1844098,2051742,2277624,2522916,2788839,
 3076664,3387713,3723360,4085032,4474210]

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Last modified December 5 16:12 EST 2019. Contains 329753 sequences. (Running on oeis4.)