A078142 - cp's OEIS frontend

A078142 a(n) is the sum of the differences of the distinct prime factors p of n and the next square larger than p.

n	a(n)
1	0
2	2
3	1
4	2
5	4
6	3
7	2
8	2
9	1
10	6
11	5
12	3
13	3
14	4
15	5
16	2
17	8
18	3
19	6
20	6
21	3
22	7
23	2
24	3
25	4
26	5
27	1
28	4
29	7
30	7
31	5
32	2
33	6
34	10
35	6
36	3
37	12
38	8
39	4
40	6
41	8
42	5
43	6
44	7
45	5
46	4
47	2
48	3
49	2
50	6
51	9
52	5
53	11
54	3
55	9
56	4
57	7
58	9
59	5
60	7
61	3
62	7
63	3
64	2
65	7
66	8
67	14
68	10
69	3
70	8
71	10
72	3
73	8
74	14
75	5
76	8
77	7
78	6
79	2
80	6
81	1
82	10
83	17
84	5
85	12
86	8
87	8
88	7
89	11
90	7
91	5
92	4
93	6
94	4
95	10
96	3
97	3
98	4

[0, 2, 1, 2, 4, 3, 2, 2, 1, 6, 5, 3, 3, 4, 5, 2, 8, 3, 6, 6, 3, 7, 2, 3, 4, 5, 1, 4, 7, 7, 5, 2, 6, 10, 6, 3, 12, 8, 4, 6, 8, 5, 6, 7, 5, 4, 2, 3, 2, 6, 9, 5, 11, 3, 9, 4, 7, 9, 5, 7, 3, 7, 3, 2, 7, 8, 14, 10, 3, 8, 10, 3, 8, 14, 5, 8, 7, 6, 2, 6, 1, 10, 17, 5, 12, 8, 8, 7, 11, 7, 5, 4, 6, 4, 10, 3, 3, 4]

cp's OEIS Frontend

A078142 a(n) is the sum of the differences of the distinct prime factors p of n and the next square larger than p.

Table of values

List of values

n	a(n)
1	0
2	2
3	1
4	2
5	4
6	3
7	2
8	2
9	1
10	6
11	5
12	3
13	3
14	4
15	5
16	2
17	8
18	3
19	6
20	6
21	3
22	7
23	2
24	3
25	4
26	5
27	1
28	4
29	7
30	7
31	5
32	2
33	6
34	10
35	6
36	3
37	12
38	8
39	4
40	6
41	8
42	5
43	6
44	7
45	5
46	4
47	2
48	3
49	2
50	6
51	9
52	5
53	11
54	3
55	9
56	4
57	7
58	9
59	5
60	7
61	3
62	7
63	3
64	2
65	7
66	8
67	14
68	10
69	3
70	8
71	10
72	3
73	8
74	14
75	5
76	8
77	7
78	6
79	2
80	6
81	1
82	10
83	17
84	5
85	12
86	8
87	8
88	7
89	11
90	7
91	5
92	4
93	6
94	4
95	10
96	3
97	3
98	4

n	a(n)
1	0
2	2
3	1
4	2
5	4
6	3
7	2
8	2
9	1
10	6
11	5
12	3
13	3
14	4
15	5
16	2
17	8
18	3
19	6
20	6
21	3
22	7
23	2
24	3
25	4
26	5
27	1
28	4
29	7
30	7
31	5
32	2
33	6
34	10
35	6
36	3
37	12
38	8
39	4
40	6
41	8
42	5
43	6
44	7
45	5
46	4
47	2
48	3
49	2
50	6
51	9
52	5
53	11
54	3
55	9
56	4
57	7
58	9
59	5
60	7
61	3
62	7
63	3
64	2
65	7
66	8
67	14
68	10
69	3
70	8
71	10
72	3
73	8
74	14
75	5
76	8
77	7
78	6
79	2
80	6
81	1
82	10
83	17
84	5
85	12
86	8
87	8
88	7
89	11
90	7
91	5
92	4
93	6
94	4
95	10
96	3
97	3
98	4

n	a(n)
1	0
2	2
3	1
4	2
5	4
6	3
7	2
8	2
9	1
10	6
11	5
12	3
13	3
14	4
15	5
16	2
17	8
18	3
19	6
20	6
21	3
22	7
23	2
24	3
25	4
26	5
27	1
28	4
29	7
30	7
31	5
32	2
33	6
34	10
35	6
36	3
37	12
38	8
39	4
40	6
41	8
42	5
43	6
44	7
45	5
46	4
47	2
48	3
49	2
50	6
51	9
52	5
53	11
54	3
55	9
56	4
57	7
58	9
59	5
60	7
61	3
62	7
63	3
64	2
65	7
66	8
67	14
68	10
69	3
70	8
71	10
72	3
73	8
74	14
75	5
76	8
77	7
78	6
79	2
80	6
81	1
82	10
83	17
84	5
85	12
86	8
87	8
88	7
89	11
90	7
91	5
92	4
93	6
94	4
95	10
96	3
97	3
98	4