A056139 - cp's OEIS frontend

A056139 a(n) = n^2 - primefloor(n)*primeceiling(n).

n	a(n)
2	0
3	0
4	1
5	0
6	1
7	0
8	-13
9	4
10	23
11	0
12	1
13	0
14	-25
15	4
16	35
17	0
18	1
19	0
20	-37
21	4
22	47
23	0
24	-91
25	-42
26	9
27	62
28	117
29	0
30	1
31	0
32	-123
33	-58
34	9
35	78
36	149
37	0
38	-73
39	4
40	83
41	0
42	1
43	0
44	-85
45	4
46	95
47	0
48	-187
49	-90
50	9
51	110
52	213
53	0
54	-211
55	-102
56	9
57	122
58	237
59	0
60	1
61	0
62	-243
63	-118
64	9
65	138
66	269
67	0
68	-133
69	4
70	143
71	0
72	1
73	0
74	-291
75	-142
76	9
77	162
78	317
79	0
80	-157
81	4
82	167
83	0
84	-331
85	-162
86	9

[0, 0, 1, 0, 1, 0, -13, 4, 23, 0, 1, 0, -25, 4, 35, 0, 1, 0, -37, 4, 47, 0, -91, -42, 9, 62, 117, 0, 1, 0, -123, -58, 9, 78, 149, 0, -73, 4, 83, 0, 1, 0, -85, 4, 95, 0, -187, -90, 9, 110, 213, 0, -211, -102, 9, 122, 237, 0, 1, 0, -243, -118, 9, 138, 269, 0, -133, 4, 143, 0, 1, 0, -291, -142, 9, 162, 317, 0, -157, 4, 167, 0, -331, -162, 9]

cp's OEIS Frontend

A056139 a(n) = n^2 - primefloor(n)*primeceiling(n).

Table of values

List of values