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A027920 as a simple table

n a(n)
4 3
5 6
6 10
7 15
8 20
9 26
10 33
11 40
12 49
13 58
14 68
15 78
16 90
17 102
18 115
19 129
20 143
21 158
22 174
23 191
24 208
25 227
26 246
27 265
28 286
29 307
30 329
31 352
32 376
33 400
34 425
35 451
36 477
37 505
38 533
39 562
40 591

[3,6,10,15,20,26,33,40,49,58,68,78,90,102,115,129,
 143,158,174,191,208,227,246,265,286,307,329,352,
 376,400,425,451,477,505,533,562,591]

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Last modified December 9 00:32 EST 2019. Contains 329871 sequences. (Running on oeis4.)