A234640 - cp's OEIS frontend

A234640 Odd numbers n for which sigma(sigma(sigma(n))) is odd.

n	a(n)
1	1
2	25
3	29
4	99
5	125
6	137
7	243
8	279
9	281
10	309
11	317
12	343
13	361
14	373
15	461
16	509
17	519
18	585
19	603
20	641
21	693
22	703
23	709
24	725
25	747
26	783
27	807
28	809
29	875
30	883
31	895
32	905
33	929
34	933
35	979
36	995
37	1003
38	1007
39	1043
40	1059
41	1091
42	1121
43	1133
44	1323
45	1591
46	1597
47	1701
48	1707
49	1779
50	1801
51	1895
52	1973

[1, 25, 29, 99, 125, 137, 243, 279, 281, 309, 317, 343, 361, 373, 461, 509, 519, 585, 603, 641, 693, 703, 709, 725, 747, 783, 807, 809, 875, 883, 895, 905, 929, 933, 979, 995, 1003, 1007, 1043, 1059, 1091, 1121, 1133, 1323, 1591, 1597, 1701, 1707, 1779, 1801, 1895, 1973]

cp's OEIS Frontend

A234640 Odd numbers n for which sigma(sigma(sigma(n))) is odd.

Table of values

List of values