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A033440 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 35
10 43
11 52
12 62
13 73
14 85
15 98
16 112
17 126
18 141
19 157
20 174
21 192
22 211
23 231
24 252
25 273
26 295
27 318
28 342
29 367
30 393
31 420
32 448
33 476
34 505
35 535
36 566
37 598
38 631
39 665
40 700
41 735
42 771
43 808
44 846
45 885
46 925

[0,0,1,3,6,10,15,21,28,35,43,52,62,73,85,98,112,
 126,141,157,174,192,211,231,252,273,295,318,342,
 367,393,420,448,476,505,535,566,598,631,665,700,
 735,771,808,846,885,925]

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Last modified May 25 08:56 EDT 2013. Contains 225646 sequences.