A054799 - cp's OEIS frontend

A054799 Integers n such that sigma(n+2) = sigma(n) + 2, where sigma = A000203, the sum of divisors of n.

n	a(n)
1	3
2	5
3	11
4	17
5	29
6	41
7	59
8	71
9	101
10	107
11	137
12	149
13	179
14	191
15	197
16	227
17	239
18	269
19	281
20	311
21	347
22	419
23	431
24	434
25	461
26	521
27	569
28	599
29	617
30	641
31	659
32	809
33	821
34	827
35	857
36	881
37	1019
38	1031
39	1049
40	1061
41	1091
42	1151
43	1229
44	1277
45	1289
46	1301
47	1319
48	1427
49	1451
50	1481
51	1487

[3, 5, 11, 17, 29, 41, 59, 71, 101, 107, 137, 149, 179, 191, 197, 227, 239, 269, 281, 311, 347, 419, 431, 434, 461, 521, 569, 599, 617, 641, 659, 809, 821, 827, 857, 881, 1019, 1031, 1049, 1061, 1091, 1151, 1229, 1277, 1289, 1301, 1319, 1427, 1451, 1481, 1487]

cp's OEIS Frontend

A054799 Integers n such that sigma(n+2) = sigma(n) + 2, where sigma = A000203, the sum of divisors of n.

Table of values

List of values