A369155 - cp's OEIS frontend

A369155 Numbers k such that d(k) < d(k - 1) and d(k) < d(k + 1), and d(k) is also a record for this type of number where d(k) is the number of divisors of k.

n	a(n)
1	5
2	9
3	51
4	153
5	351
6	3249
7	6579
8	19551
9	47151
10	122451
11	246975
12	393471
13	3292289
14	10792495
15	15270849
16	25770879
17	58967271
18	60642945
19	242340175
20	481701375
21	5122147185
22	6644739375
23	6971026699
24	21061868751
25	92330654625
26	213089528575
27	1159484186575
28	1305664357375

[5, 9, 51, 153, 351, 3249, 6579, 19551, 47151, 122451, 246975, 393471, 3292289, 10792495, 15270849, 25770879, 58967271, 60642945, 242340175, 481701375, 5122147185, 6644739375, 6971026699, 21061868751, 92330654625, 213089528575, 1159484186575, 1305664357375]

cp's OEIS Frontend

A369155 Numbers k such that d(k) < d(k - 1) and d(k) < d(k + 1), and d(k) is also a record for this type of number where d(k) is the number of divisors of k.

Table of values

List of values