A179435 - cp's OEIS frontend

A179435 For positive n with prime decomposition n = Product_{j=1..m} (p_j^k_j) define a_n = Sum_{j=1..m} (p_j*k_j) and b_n = Sum_{j=1..m} (p_j^k_j). This sequence gives those n for which a_n and b_n are both prime and unequal.

n	a(n)
1	40
2	48
3	54
4	88
5	108
6	184
7	250
8	384
9	424
10	432
11	448
12	808
13	864
14	1048
15	1216
16	1384
17	1528
18	1575
19	1680
20	1792
21	1864
22	1890
23	2104
24	2184
25	2457
26	2925
27	2944
28	3080
29	3120
30	3328
31	3510
32	3696
33	3712
34	3915
35	4125
36	4158
37	4288
38	4504
39	4744
40	4950
41	5224
42	5488
43	5632
44	5928
45	5940
46	6240

[40, 48, 54, 88, 108, 184, 250, 384, 424, 432, 448, 808, 864, 1048, 1216, 1384, 1528, 1575, 1680, 1792, 1864, 1890, 2104, 2184, 2457, 2925, 2944, 3080, 3120, 3328, 3510, 3696, 3712, 3915, 4125, 4158, 4288, 4504, 4744, 4950, 5224, 5488, 5632, 5928, 5940, 6240]

cp's OEIS Frontend

A179435 For positive n with prime decomposition n = Product_{j=1..m} (p_j^k_j) define a_n = Sum_{j=1..m} (p_j*k_j) and b_n = Sum_{j=1..m} (p_j^k_j). This sequence gives those n for which a_n and b_n are both prime and unequal.

Table of values

List of values