A109883 - cp's OEIS frontend

A109883 Start subtracting from n its divisors beginning from 1 until one reaches a number smaller than the last divisor subtracted or reaches the last nontrivial divisor < n. Define this to be the perfect deficiency of n. Then a(n) = perfect deficiency of n.

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	0
7	6
8	1
9	5
10	2
11	10
12	2
13	12
14	4
15	6
16	1
17	16
18	6
19	18
20	8
21	10
22	8
23	22
24	0
25	19
26	10
27	14
28	0
29	28
30	3
31	30
32	1
33	18
34	14
35	22
36	11
37	36
38	16
39	22
40	10
41	40
42	9
43	42
44	4
45	12
46	20
47	46
48	12
49	41
50	7
51	30
52	6
53	52
54	15
55	38
56	20
57	34
58	26
59	58
60	2
61	60
62	28
63	22
64	1
65	46
66	21
67	66
68	10
69	42
70	31
71	70
72	9
73	72
74	34
75	26
76	12
77	58
78	27
79	78

[0, 1, 2, 1, 4, 0, 6, 1, 5, 2, 10, 2, 12, 4, 6, 1, 16, 6, 18, 8, 10, 8, 22, 0, 19, 10, 14, 0, 28, 3, 30, 1, 18, 14, 22, 11, 36, 16, 22, 10, 40, 9, 42, 4, 12, 20, 46, 12, 41, 7, 30, 6, 52, 15, 38, 20, 34, 26, 58, 2, 60, 28, 22, 1, 46, 21, 66, 10, 42, 31, 70, 9, 72, 34, 26, 12, 58, 27, 78]

cp's OEIS Frontend

A109883 Start subtracting from n its divisors beginning from 1 until one reaches a number smaller than the last divisor subtracted or reaches the last nontrivial divisor < n. Define this to be the perfect deficiency of n. Then a(n) = perfect deficiency of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	0
7	6
8	1
9	5
10	2
11	10
12	2
13	12
14	4
15	6
16	1
17	16
18	6
19	18
20	8
21	10
22	8
23	22
24	0
25	19
26	10
27	14
28	0
29	28
30	3
31	30
32	1
33	18
34	14
35	22
36	11
37	36
38	16
39	22
40	10
41	40
42	9
43	42
44	4
45	12
46	20
47	46
48	12
49	41
50	7
51	30
52	6
53	52
54	15
55	38
56	20
57	34
58	26
59	58
60	2
61	60
62	28
63	22
64	1
65	46
66	21
67	66
68	10
69	42
70	31
71	70
72	9
73	72
74	34
75	26
76	12
77	58
78	27
79	78

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	0
7	6
8	1
9	5
10	2
11	10
12	2
13	12
14	4
15	6
16	1
17	16
18	6
19	18
20	8
21	10
22	8
23	22
24	0
25	19
26	10
27	14
28	0
29	28
30	3
31	30
32	1
33	18
34	14
35	22
36	11
37	36
38	16
39	22
40	10
41	40
42	9
43	42
44	4
45	12
46	20
47	46
48	12
49	41
50	7
51	30
52	6
53	52
54	15
55	38
56	20
57	34
58	26
59	58
60	2
61	60
62	28
63	22
64	1
65	46
66	21
67	66
68	10
69	42
70	31
71	70
72	9
73	72
74	34
75	26
76	12
77	58
78	27
79	78

n	a(n)
1	0
2	1
3	2
4	1
5	4
6	0
7	6
8	1
9	5
10	2
11	10
12	2
13	12
14	4
15	6
16	1
17	16
18	6
19	18
20	8
21	10
22	8
23	22
24	0
25	19
26	10
27	14
28	0
29	28
30	3
31	30
32	1
33	18
34	14
35	22
36	11
37	36
38	16
39	22
40	10
41	40
42	9
43	42
44	4
45	12
46	20
47	46
48	12
49	41
50	7
51	30
52	6
53	52
54	15
55	38
56	20
57	34
58	26
59	58
60	2
61	60
62	28
63	22
64	1
65	46
66	21
67	66
68	10
69	42
70	31
71	70
72	9
73	72
74	34
75	26
76	12
77	58
78	27
79	78