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A213820 as a simple table

n a(n)
1 2
2 18
3 60
4 140
5 270
6 462
7 728
8 1080
9 1530
10 2090
11 2772
12 3588
13 4550
14 5670
15 6960
16 8432
17 10098
18 11970
19 14060
20 16380
21 18942
22 21758
23 24840
24 28200
25 31850
26 35802
27 40068
28 44660
29 49590
30 54870
31 60512
32 66528
33 72930
34 79730
35 86940
36 94572
37 102638
38 111150
39 120120
40 129560
41 139482

[2,18,60,140,270,462,728,1080,1530,2090,2772,3588,
 4550,5670,6960,8432,10098,11970,14060,16380,18942,
 21758,24840,28200,31850,35802,40068,44660,49590,
 54870,60512,66528,72930,79730,86940,94572,102638,
 111150,120120,129560,139482]

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Last modified April 19 14:50 EDT 2024. Contains 371792 sequences. (Running on oeis4.)