A109444 - OEIS

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A109444 as a simple table

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	21
7	28
8	34
9	40
10	50
11	61
12	73
13	86
14	100
15	115
16	123
17	140
18	152
19	171
20	191
21	212
22	234
23	257
24	275
25	285
26	311
27	320
28	348
29	377
30	407
31	438
32	448
33	481
34	515
35	550
36	574
37	611
38	649
39	688
40	718
41	759
42	801
43	844
44	888
45	918
46	964
47	1011
48	1035
49	1049
50	1069
51	1120
52	1172
53	1225

[1,3,6,10,15,21,28,34,40,50,61,73,86,100,115,123, 140,152,171,191,212,234,257,275,285,311,320,348, 377,407,438,448,481,515,550,574,611,649,688,718, 759,801,844,888,918,964,1011,1035,1049,1069,1120, 1172,1225]