A243971 - cp's OEIS frontend

A243971 Numbers n that cannot be obtained as a partial sum of the divisors (taken in descending order, from m down to 1) of any m < n.

n	a(n)
1	1
2	2
3	5
4	10
5	16
6	19
7	26
8	29
9	34
10	37
11	43
12	46
13	58
14	64
15	65
16	67
17	73
18	82
19	86
20	94
21	101
22	109
23	122
24	130
25	134
26	142
27	145
28	146
29	149
30	157
31	163
32	190
33	193
34	197
35	199
36	202
37	206
38	211
39	229
40	257
41	262
42	281
43	283
44	290
45	298
46	302
47	310
48	334
49	337
50	347
51	349
52	367
53	401
54	409
55	421
56	430

[1, 2, 5, 10, 16, 19, 26, 29, 34, 37, 43, 46, 58, 64, 65, 67, 73, 82, 86, 94, 101, 109, 122, 130, 134, 142, 145, 146, 149, 157, 163, 190, 193, 197, 199, 202, 206, 211, 229, 257, 262, 281, 283, 290, 298, 302, 310, 334, 337, 347, 349, 367, 401, 409, 421, 430]

cp's OEIS Frontend

A243971 Numbers n that cannot be obtained as a partial sum of the divisors (taken in descending order, from m down to 1) of any m < n.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	10
5	16
6	19
7	26
8	29
9	34
10	37
11	43
12	46
13	58
14	64
15	65
16	67
17	73
18	82
19	86
20	94
21	101
22	109
23	122
24	130
25	134
26	142
27	145
28	146
29	149
30	157
31	163
32	190
33	193
34	197
35	199
36	202
37	206
38	211
39	229
40	257
41	262
42	281
43	283
44	290
45	298
46	302
47	310
48	334
49	337
50	347
51	349
52	367
53	401
54	409
55	421
56	430

n	a(n)
1	1
2	2
3	5
4	10
5	16
6	19
7	26
8	29
9	34
10	37
11	43
12	46
13	58
14	64
15	65
16	67
17	73
18	82
19	86
20	94
21	101
22	109
23	122
24	130
25	134
26	142
27	145
28	146
29	149
30	157
31	163
32	190
33	193
34	197
35	199
36	202
37	206
38	211
39	229
40	257
41	262
42	281
43	283
44	290
45	298
46	302
47	310
48	334
49	337
50	347
51	349
52	367
53	401
54	409
55	421
56	430

n	a(n)
1	1
2	2
3	5
4	10
5	16
6	19
7	26
8	29
9	34
10	37
11	43
12	46
13	58
14	64
15	65
16	67
17	73
18	82
19	86
20	94
21	101
22	109
23	122
24	130
25	134
26	142
27	145
28	146
29	149
30	157
31	163
32	190
33	193
34	197
35	199
36	202
37	206
38	211
39	229
40	257
41	262
42	281
43	283
44	290
45	298
46	302
47	310
48	334
49	337
50	347
51	349
52	367
53	401
54	409
55	421
56	430