A293407 - OEIS

A293407 as a simple table

n	a(n)
0	0
1	1
2	3
3	6
4	10
5	16
6	23
7	31
8	40
9	51
10	62
11	75
12	89
13	105
14	122
15	140
16	159
17	179
18	201
19	224
20	248
21	273
22	300
23	327
24	356
25	387
26	418
27	451
28	485
29	520
30	557
31	594
32	633
33	674
34	715
35	758
36	801
37	847
38	893
39	941
40	989
41	1039
42	1091
43	1143
44	1197
45	1252
46	1308
47	1366
48	1424
49	1484
50	1546
51	1608
52	1672

[0,1,3,6,10,16,23,31,40,51,62,75,89,105,122,140, 159,179,201,224,248,273,300,327,356,387,418,451, 485,520,557,594,633,674,715,758,801,847,893,941, 989,1039,1091,1143,1197,1252,1308,1366,1424,1484, 1546,1608,1672]