A273140 - OEIS

A273140 as a simple table

n	a(n)
1	1
2	3
3	6
4	11
5	17
6	25
7	34
8	46
9	59
10	74
11	90
12	109
13	129
14	151
15	174
16	201
17	229
18	259
19	290
20	323
21	358
22	394
23	434
24	475
25	518
26	562
27	609
28	657
29	707
30	758
31	814
32	871
33	930
34	990
35	1052
36	1116
37	1181
38	1249
39	1318
40	1389
41	1462
42	1536
43	1615
44	1695
45	1777
46	1860
47	1946
48	2033
49	2122
50	2212
51	2305
52	2400
53	2496
54	2594
55	2694
56	2795

[1,3,6,11,17,25,34,46,59,74,90,109,129,151,174, 201,229,259,290,323,358,394,434,475,518,562,609, 657,707,758,814,871,930,990,1052,1116,1181,1249, 1318,1389,1462,1536,1615,1695,1777,1860,1946,2033, 2122,2212,2305,2400,2496,2594,2694,2795]