A183143 - OEIS

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A183143 as a simple table

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	9
7	13
8	17
9	22
10	27
11	33
12	39
13	46
14	54
15	62
16	71
17	80
18	90
19	100
20	111
21	123
22	135
23	148
24	161
25	175
26	190
27	205
28	221
29	237
30	254
31	271
32	289
33	308
34	327
35	347
36	367
37	388
38	409
39	431
40	454
41	477
42	501
43	525
44	550
45	575
46	601
47	628
48	655
49	683
50	711
51	740
52	770
53	800
54	831

[0,1,2,4,6,9,13,17,22,27,33,39,46,54,62,71,80,90, 100,111,123,135,148,161,175,190,205,221,237,254, 271,289,308,327,347,367,388,409,431,454,477,501, 525,550,575,601,628,655,683,711,740,770,800,831]

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	9
7	13
8	17
9	22
10	27
11	33
12	39
13	46
14	54
15	62
16	71
17	80
18	90
19	100
20	111
21	123
22	135
23	148
24	161
25	175
26	190
27	205
28	221
29	237
30	254
31	271
32	289
33	308
34	327
35	347
36	367
37	388
38	409
39	431
40	454
41	477
42	501
43	525
44	550
45	575
46	601
47	628
48	655
49	683
50	711
51	740
52	770
53	800
54	831

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	9
7	13
8	17
9	22
10	27
11	33
12	39
13	46
14	54
15	62
16	71
17	80
18	90
19	100
20	111
21	123
22	135
23	148
24	161
25	175
26	190
27	205
28	221
29	237
30	254
31	271
32	289
33	308
34	327
35	347
36	367
37	388
38	409
39	431
40	454
41	477
42	501
43	525
44	550
45	575
46	601
47	628
48	655
49	683
50	711
51	740
52	770
53	800
54	831

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	9
7	13
8	17
9	22
10	27
11	33
12	39
13	46
14	54
15	62
16	71
17	80
18	90
19	100
20	111
21	123
22	135
23	148
24	161
25	175
26	190
27	205
28	221
29	237
30	254
31	271
32	289
33	308
34	327
35	347
36	367
37	388
38	409
39	431
40	454
41	477
42	501
43	525
44	550
45	575
46	601
47	628
48	655
49	683
50	711
51	740
52	770
53	800
54	831