A178601 - cp's OEIS frontend

A178601 a(n) = s(s(n)), where s(n) = sigma(n)-n = A001065(n).

n	a(n)
2	0
3	0
4	1
5	0
6	6
7	0
8	1
9	3
10	7
11	0
12	15
13	0
14	8
15	4
16	9
17	0
18	11
19	0
20	14
21	1
22	10
23	0
24	55
25	6
26	15
27	1
28	28
29	0
30	54
31	0
32	1
33	9
34	22
35	1
36	17
37	0
38	14
39	1
40	43
41	0
42	66
43	0
44	50
45	15
46	16
47	0
48	64
49	7
50	1
51	11
52	26
53	0
54	78
55	1
56	63
57	1
58	31
59	0
60	172
61	0
62	20
63	1
64	41
65	1
66	90
67	0
68	32
69	13
70	40
71	0
72	45
73	0
74	50
75	8
76	63
77	1
78	144
79	0
80	56
81	50
82	40
83	0
84	196
85	1
86	26
87	15
88	76
89	0
90	259
91	11
92	64
93	13
94	43
95	6
96	236
97	0

[0, 0, 1, 0, 6, 0, 1, 3, 7, 0, 15, 0, 8, 4, 9, 0, 11, 0, 14, 1, 10, 0, 55, 6, 15, 1, 28, 0, 54, 0, 1, 9, 22, 1, 17, 0, 14, 1, 43, 0, 66, 0, 50, 15, 16, 0, 64, 7, 1, 11, 26, 0, 78, 1, 63, 1, 31, 0, 172, 0, 20, 1, 41, 1, 90, 0, 32, 13, 40, 0, 45, 0, 50, 8, 63, 1, 144, 0, 56, 50, 40, 0, 196, 1, 26, 15, 76, 0, 259, 11, 64, 13, 43, 6, 236, 0]

cp's OEIS Frontend

A178601 a(n) = s(s(n)), where s(n) = sigma(n)-n = A001065(n).

Table of values

List of values

n	a(n)
2	0
3	0
4	1
5	0
6	6
7	0
8	1
9	3
10	7
11	0
12	15
13	0
14	8
15	4
16	9
17	0
18	11
19	0
20	14
21	1
22	10
23	0
24	55
25	6
26	15
27	1
28	28
29	0
30	54
31	0
32	1
33	9
34	22
35	1
36	17
37	0
38	14
39	1
40	43
41	0
42	66
43	0
44	50
45	15
46	16
47	0
48	64
49	7
50	1
51	11
52	26
53	0
54	78
55	1
56	63
57	1
58	31
59	0
60	172
61	0
62	20
63	1
64	41
65	1
66	90
67	0
68	32
69	13
70	40
71	0
72	45
73	0
74	50
75	8
76	63
77	1
78	144
79	0
80	56
81	50
82	40
83	0
84	196
85	1
86	26
87	15
88	76
89	0
90	259
91	11
92	64
93	13
94	43
95	6
96	236
97	0

n	a(n)
2	0
3	0
4	1
5	0
6	6
7	0
8	1
9	3
10	7
11	0
12	15
13	0
14	8
15	4
16	9
17	0
18	11
19	0
20	14
21	1
22	10
23	0
24	55
25	6
26	15
27	1
28	28
29	0
30	54
31	0
32	1
33	9
34	22
35	1
36	17
37	0
38	14
39	1
40	43
41	0
42	66
43	0
44	50
45	15
46	16
47	0
48	64
49	7
50	1
51	11
52	26
53	0
54	78
55	1
56	63
57	1
58	31
59	0
60	172
61	0
62	20
63	1
64	41
65	1
66	90
67	0
68	32
69	13
70	40
71	0
72	45
73	0
74	50
75	8
76	63
77	1
78	144
79	0
80	56
81	50
82	40
83	0
84	196
85	1
86	26
87	15
88	76
89	0
90	259
91	11
92	64
93	13
94	43
95	6
96	236
97	0

n	a(n)
2	0
3	0
4	1
5	0
6	6
7	0
8	1
9	3
10	7
11	0
12	15
13	0
14	8
15	4
16	9
17	0
18	11
19	0
20	14
21	1
22	10
23	0
24	55
25	6
26	15
27	1
28	28
29	0
30	54
31	0
32	1
33	9
34	22
35	1
36	17
37	0
38	14
39	1
40	43
41	0
42	66
43	0
44	50
45	15
46	16
47	0
48	64
49	7
50	1
51	11
52	26
53	0
54	78
55	1
56	63
57	1
58	31
59	0
60	172
61	0
62	20
63	1
64	41
65	1
66	90
67	0
68	32
69	13
70	40
71	0
72	45
73	0
74	50
75	8
76	63
77	1
78	144
79	0
80	56
81	50
82	40
83	0
84	196
85	1
86	26
87	15
88	76
89	0
90	259
91	11
92	64
93	13
94	43
95	6
96	236
97	0