A390807 - OEIS

A390807 as a simple table

n	a(n)
1	1
2	3
3	6
4	10
5	15
6	21
7	28
8	28
9	45
10	55
11	66
12	78
13	91
14	105
15	120
16	112
17	153
18	171
19	190
20	210
21	231
22	253
23	276
24	252
25	325
26	351
27	351
28	406
29	435
30	465
31	496
32	448
33	561
34	595
35	630
36	666
37	703
38	741
39	780
40	700
41	861
42	903
43	946
44	990
45	1035
46	1081
47	1128
48	1008
49	1225
50	1275
51	1326
52	1378
53	1431
54	1404

[1,3,6,10,15,21,28,28,45,55,66,78,91,105,120,112, 153,171,190,210,231,253,276,252,325,351,351,406, 435,465,496,448,561,595,630,666,703,741,780,700, 861,903,946,990,1035,1081,1128,1008,1225,1275, 1326,1378,1431,1404]