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A117520 as a simple table

n a(n)
1 0
2 1
3 3
4 6
5 10
6 15
7 21
8 28
9 55
10 66
11 78
12 91
13 105
14 120
15 136
16 190
17 210
18 231
19 253
20 276
21 300
22 325
23 406
24 435
25 465
26 496
27 528
28 561
29 595
30 703
31 741
32 780
33 820
34 861
35 903
36 946
37 1081
38 1128
39 1176
40 1225
41 1275
42 1326
43 1378
44 1540
45 1596
46 1653
47 1711
48 1770
49 1830
50 1891
51 2080
52 2145

[0,1,3,6,10,15,21,28,55,66,78,91,105,120,136,190,
 210,231,253,276,300,325,406,435,465,496,528,561,
 595,703,741,780,820,861,903,946,1081,1128,1176,
 1225,1275,1326,1378,1540,1596,1653,1711,1770,1830,
 1891,2080,2145]

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Last modified September 16 08:52 EDT 2019. Contains 327092 sequences. (Running on oeis4.)