A137532 - cp's OEIS frontend

A137532 a(n) is the smallest positive integer k such that d(k) = d(k+n) = 2*n, where d(m) (A000005) is the number of positive divisors of m, or 0 if no such k exists.

n	a(n)
1	2
2	6
3	172
4	66
5	15952
6	84
7	22592
8	888
9	2196
10	3750
11	459932661
12	660
13	86817796083
14	185152
15	143366096
16	5304
17	17685013528576
18	3150
19	1786574475624429
20	1272510
21	29059703104
22	12872682
23	4817557477673402368
24	9576
25	85608255863
26	15744471040
27	1179648
28	124718750
29	1765038427619364800823267

[2, 6, 172, 66, 15952, 84, 22592, 888, 2196, 3750, 459932661, 660, 86817796083, 185152, 143366096, 5304, 17685013528576, 3150, 1786574475624429, 1272510, 29059703104, 12872682, 4817557477673402368, 9576, 85608255863, 15744471040, 1179648, 124718750, 1765038427619364800823267]

cp's OEIS Frontend

A137532 a(n) is the smallest positive integer k such that d(k) = d(k+n) = 2*n, where d(m) (A000005) is the number of positive divisors of m, or 0 if no such k exists.

Table of values

List of values