A062095 - cp's OEIS frontend

A062095 a(1) = 1, 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	1
2	11
3	111
4	337
5	1337
6	7191
7	51141
8	317047
9	1317047
10	2814687
11	9312743
12	25193697
13	30981533
14	51496017
15	192326779
16	1427134777
17	4987286171
18	6471777063
19	61653104971
20	259323776747
21	737046253821
22	7171027958513
23	31727922601647

[1, 11, 111, 337, 1337, 7191, 51141, 317047, 1317047, 2814687, 9312743, 25193697, 30981533, 51496017, 192326779, 1427134777, 4987286171, 6471777063, 61653104971, 259323776747, 737046253821, 7171027958513, 31727922601647]

cp's OEIS Frontend

A062095 a(1) = 1, 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