A323726 - cp's OEIS frontend

A323726 Odd numbers k such that sigma(k-1) < sigma(k) < sigma(k+1), sigma(n) = A000203.

n	a(n)
1	3
2	63
3	75
4	135
5	147
6	195
7	255
8	399
9	459
10	483
11	495
12	555
13	567
14	615
15	627
16	663
17	675
18	735
19	759
20	795
21	819
22	855
23	915
24	975
25	999
26	1035
27	1095
28	1215
29	1239
30	1287
31	1323
32	1455
33	1515
34	1539
35	1647
36	1659
37	1683
38	1815
39	1827
40	1875
41	1935
42	2079
43	2115
44	2175
45	2235
46	2247
47	2295
48	2415
49	2499

[3, 63, 75, 135, 147, 195, 255, 399, 459, 483, 495, 555, 567, 615, 627, 663, 675, 735, 759, 795, 819, 855, 915, 975, 999, 1035, 1095, 1215, 1239, 1287, 1323, 1455, 1515, 1539, 1647, 1659, 1683, 1815, 1827, 1875, 1935, 2079, 2115, 2175, 2235, 2247, 2295, 2415, 2499]

cp's OEIS Frontend

A323726 Odd numbers k such that sigma(k-1) < sigma(k) < sigma(k+1), sigma(n) = A000203.

Table of values

List of values