A137179 - cp's OEIS frontend

A137179 a(n) = the smallest positive integer m such that d(m) + d(m+1) = n, where d(m) is the number of positive divisors of m. (a(n) is the smallest m where A092405(m) = n.)

n	a(n)
3	1
4	2
5	3
6	5
7	8
8	11
9	15
10	20
11	24
12	39
13	35
14	59
15	80
16	84
17	195
18	167
19	120
20	119
21	224
22	239
23	399
24	335
25	440
26	359
27	360
28	480
29	1520
30	539
31	899
32	719
33	1224
34	720
35	840
36	1079
37	3135
38	1259
39	5183
40	1260
41	2400
42	2160
43	1680
44	1679
45	9408
46	2880
47	7056
48	2639
49	3024
50	2520
51	6240
52	2519
53	7055
54	6929

[1, 2, 3, 5, 8, 11, 15, 20, 24, 39, 35, 59, 80, 84, 195, 167, 120, 119, 224, 239, 399, 335, 440, 359, 360, 480, 1520, 539, 899, 719, 1224, 720, 840, 1079, 3135, 1259, 5183, 1260, 2400, 2160, 1680, 1679, 9408, 2880, 7056, 2639, 3024, 2520, 6240, 2519, 7055, 6929]

cp's OEIS Frontend

A137179 a(n) = the smallest positive integer m such that d(m) + d(m+1) = n, where d(m) is the number of positive divisors of m. (a(n) is the smallest m where A092405(m) = n.)

Table of values

List of values