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A008020 as a simple table

n a(n)
0 1
1 4
2 9
3 18
4 30
5 43
6 64
7 90
8 111
9 140
10 181
11 215
12 249
13 296
14 342
15 389
16 450
17 511
18 565
19 624
20 690
21 766
22 850
23 927
24 1003
25 1088
26 1172
27 1262
28 1368
29 1471
30 1566
31 1669
32 1779
33 1892
34 2011
35 2132
36 2256
37 2384
38 2510
39 2642
40 2784
41 2925
42 3067
43 3214
44 3364
45 3521
46 3680
47 3838
48 4007

[1,4,9,18,30,43,64,90,111,140,181,215,249,296,342,
 389,450,511,565,624,690,766,850,927,1003,1088,
 1172,1262,1368,1471,1566,1669,1779,1892,2011,2132,
 2256,2384,2510,2642,2784,2925,3067,3214,3364,3521,
 3680,3838,4007]

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Last modified January 19 15:20 EST 2021. Contains 340270 sequences. (Running on oeis4.)