A244448 - cp's OEIS frontend

A244448 a(n) is the smallest integer m such that m-n is composite and phi(m-n) + sigma(m+n) = phi(m+n) + sigma(m-n).

n	a(n)
0	4
1	153
2	442
3	213
4	179
5	120
6	46
7	37
8	47
9	264
10	145416
11	1101
12	107
13	79
14	71
15	78
16	716
17	637
18	98
19	249
20	71
21	126
22	13258
23	1243
24	119
25	163
26	119
27	131
28	140497
29	381
30	191
31	156
32	101
33	169
34	1574
35	315
36	151
37	193
38	167
39	2158
40	148
41	104
42	202
43	289
44	1969
45	882
46	2572
47	428
48	251
49	357
50	314
51	283

[4, 153, 442, 213, 179, 120, 46, 37, 47, 264, 145416, 1101, 107, 79, 71, 78, 716, 637, 98, 249, 71, 126, 13258, 1243, 119, 163, 119, 131, 140497, 381, 191, 156, 101, 169, 1574, 315, 151, 193, 167, 2158, 148, 104, 202, 289, 1969, 882, 2572, 428, 251, 357, 314, 283]

cp's OEIS Frontend

A244448 a(n) is the smallest integer m such that m-n is composite and phi(m-n) + sigma(m+n) = phi(m+n) + sigma(m-n).

Table of values

List of values