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A047800 as a simple table

n a(n)
0 1
1 3
2 6
3 10
4 15
5 20
6 27
7 34
8 42
9 51
10 61
11 71
12 83
13 94
14 106
15 120
16 135
17 148
18 165
19 180
20 198
21 216
22 235
23 252
24 273
25 294
26 315
27 337
28 360
29 382
30 408
31 431
32 457
33 484
34 508
35 536
36 567
37 595
38 624
39 653
40 687
41 715
42 749
43 781
44 813
45 850
46 884
47 919
48 957
49 993
50 1031
51 1069
52 1108
53 1142

[1,3,6,10,15,20,27,34,42,51,61,71,83,94,106,120,
 135,148,165,180,198,216,235,252,273,294,315,337,
 360,382,408,431,457,484,508,536,567,595,624,653,
 687,715,749,781,813,850,884,919,957,993,1031,1069,
 1108,1142]

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Last modified April 28 05:00 EDT 2024. Contains 372020 sequences. (Running on oeis4.)