A062094 - cp's OEIS frontend

A062094 a(1) = 2, a(n) = concatenation of two closest factors of a(n-1) whose product equals a(n-1) or if a(n-1) is a prime then the concatenation of 1 and a(n-1).

n	a(n)
1	2
2	12
3	34
4	217
5	731
6	1743
7	2183
8	3759
9	21179
10	121179
11	931303
12	1931303
13	11175573
14	11379829
15	17896361
16	18419721
17	96919009
18	889910891
19	1889910891
20	2742368917
21	25741106537
22	110203233579
23	679231622473
24	1679231622473
25	7921256096487

[2, 12, 34, 217, 731, 1743, 2183, 3759, 21179, 121179, 931303, 1931303, 11175573, 11379829, 17896361, 18419721, 96919009, 889910891, 1889910891, 2742368917, 25741106537, 110203233579, 679231622473, 1679231622473, 7921256096487]

cp's OEIS Frontend

A062094 a(1) = 2, a(n) = concatenation of two closest factors of a(n-1) whose product equals a(n-1) or if a(n-1) is a prime then the concatenation of 1 and a(n-1).

Table of values

List of values