A096991 - cp's OEIS frontend

A096991 Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=4.

n	a(n)
1	401
2	451
3	489
4	491
5	505
6	513
7	567
8	577
9	629
10	631
11	652
12	661
13	673
14	679
15	685
16	691
17	713
18	731
19	737
20	751
21	757
22	769
23	773
24	791
25	802
26	808
27	811
28	817
29	825
30	829
31	833
32	847
33	851
34	853
35	859
36	867
37	869
38	871
39	873
40	877
41	889
42	893
43	899
44	901
45	902
46	907
47	911
48	917
49	919
50	923
51	931

[401, 451, 489, 491, 505, 513, 567, 577, 629, 631, 652, 661, 673, 679, 685, 691, 713, 731, 737, 751, 757, 769, 773, 791, 802, 808, 811, 817, 825, 829, 833, 847, 851, 853, 859, 867, 869, 871, 873, 877, 889, 893, 899, 901, 902, 907, 911, 917, 919, 923, 931]

cp's OEIS Frontend

A096991 Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=4.

Table of values

List of values

n	a(n)
1	401
2	451
3	489
4	491
5	505
6	513
7	567
8	577
9	629
10	631
11	652
12	661
13	673
14	679
15	685
16	691
17	713
18	731
19	737
20	751
21	757
22	769
23	773
24	791
25	802
26	808
27	811
28	817
29	825
30	829
31	833
32	847
33	851
34	853
35	859
36	867
37	869
38	871
39	873
40	877
41	889
42	893
43	899
44	901
45	902
46	907
47	911
48	917
49	919
50	923
51	931

n	a(n)
1	401
2	451
3	489
4	491
5	505
6	513
7	567
8	577
9	629
10	631
11	652
12	661
13	673
14	679
15	685
16	691
17	713
18	731
19	737
20	751
21	757
22	769
23	773
24	791
25	802
26	808
27	811
28	817
29	825
30	829
31	833
32	847
33	851
34	853
35	859
36	867
37	869
38	871
39	873
40	877
41	889
42	893
43	899
44	901
45	902
46	907
47	911
48	917
49	919
50	923
51	931

n	a(n)
1	401
2	451
3	489
4	491
5	505
6	513
7	567
8	577
9	629
10	631
11	652
12	661
13	673
14	679
15	685
16	691
17	713
18	731
19	737
20	751
21	757
22	769
23	773
24	791
25	802
26	808
27	811
28	817
29	825
30	829
31	833
32	847
33	851
34	853
35	859
36	867
37	869
38	871
39	873
40	877
41	889
42	893
43	899
44	901
45	902
46	907
47	911
48	917
49	919
50	923
51	931