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A033443 as a simple table

n a(n)
0 0
1 0
2 1
3 3
4 6
5 10
6 15
7 21
8 28
9 36
10 45
11 55
12 65
13 76
14 88
15 101
16 115
17 130
18 146
19 163
20 181
21 200
22 220
23 240
24 261
25 283
26 306
27 330
28 355
29 381
30 408
31 436
32 465
33 495
34 525
35 556
36 588
37 621
38 655
39 690
40 726
41 763
42 801
43 840
44 880
45 920
46 961
47 1003
48 1046
49 1090
50 1135
51 1181
52 1228
53 1276

[0,0,1,3,6,10,15,21,28,36,45,55,65,76,88,101,115,
 130,146,163,181,200,220,240,261,283,306,330,355,
 381,408,436,465,495,525,556,588,621,655,690,726,
 763,801,840,880,920,961,1003,1046,1090,1135,1181,
 1228,1276]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)