A244447 - cp's OEIS frontend

A244447 a(n) is the smallest integer m such that m-n is composite and phi(m+n) + sigma(m-n) = 2*m.

n	a(n)
1	11
2	8
3	13
4	37350
5	25
6	18
7	28
8	20
9	61
10	22
11	44
12	40
13	52
14	250
15	39
16	60
17	68
18	60
19	58
20	76
21	168
22	46
23	92
24	69
25	2040
26	56
27	126
28	84
29	114
30	140
31	88
32	74
33	108
34	90
35	288
36	92
37	148
38	108
39	283
40	324
41	164
42	180
43	100
44	40878
45	125
46	474
47	162
48	108
49	773
50	71
51	111
52	240
53	168
54	315
55	148
56	194
57	564
58	390
59	128
60	144
61	124
62	164
63	153
64	279
65	1008
66	162
67	102
68	152
69	432
70	222

[11, 8, 13, 37350, 25, 18, 28, 20, 61, 22, 44, 40, 52, 250, 39, 60, 68, 60, 58, 76, 168, 46, 92, 69, 2040, 56, 126, 84, 114, 140, 88, 74, 108, 90, 288, 92, 148, 108, 283, 324, 164, 180, 100, 40878, 125, 474, 162, 108, 773, 71, 111, 240, 168, 315, 148, 194, 564, 390, 128, 144, 124, 164, 153, 279, 1008, 162, 102, 152, 432, 222]

cp's OEIS Frontend

A244447 a(n) is the smallest integer m such that m-n is composite and phi(m+n) + sigma(m-n) = 2*m.

Table of values

List of values