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A009921 as a simple table

n a(n)
0 1
1 4
2 10
3 18
4 33
5 57
6 77
7 95
8 129
9 172
10 209
11 248
12 292
13 341
14 401
15 466
16 527
17 587
18 656
19 736
20 820
21 903
22 989
23 1079
24 1171
25 1273
26 1382
27 1487
28 1597
29 1718
30 1837
31 1955
32 2083
33 2223
34 2364
35 2499
36 2639
37 2785
38 2939
39 3104
40 3270
41 3428
42 3586
43 3763
44 3949
45 4134
46 4318

[1,4,10,18,33,57,77,95,129,172,209,248,292,341,
 401,466,527,587,656,736,820,903,989,1079,1171,
 1273,1382,1487,1597,1718,1837,1955,2083,2223,2364,
 2499,2639,2785,2939,3104,3270,3428,3586,3763,3949,
 4134,4318]

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Last modified July 31 06:57 EDT 2021. Contains 346369 sequences. (Running on oeis4.)