A317490 - cp's OEIS frontend

A317490 a(n) = min {i - j} where i*j is a factorization of the n-th partial product of the semiprimes (A112141).

n	a(n)
1	0
2	2
3	6
4	3
5	12
6	3
7	126
8	153
9	765
10	1050
11	5348
12	14850
13	85050
14	501200
15	91280
16	3661983
17	25633881
18	66271296
19	215467945
20	254861640
21	5311480020
22	75327142968
23	122703152000
24	2187956957004
25	3449084839200
26	19305922856220
27	11327171375520
28	58038845751810
29	2222926571960640

[0, 2, 6, 3, 12, 3, 126, 153, 765, 1050, 5348, 14850, 85050, 501200, 91280, 3661983, 25633881, 66271296, 215467945, 254861640, 5311480020, 75327142968, 122703152000, 2187956957004, 3449084839200, 19305922856220, 11327171375520, 58038845751810, 2222926571960640]

cp's OEIS Frontend

A317490 a(n) = min {i - j} where i*j is a factorization of the n-th partial product of the semiprimes (A112141).

Table of values

List of values