A106557 - cp's OEIS frontend

A106557 Largest number that can be obtained by concatenating the two factors of the n-th semiprime.

n	a(n)
1	22
2	32
3	33
4	52
5	72
6	53
7	73
8	211
9	55
10	213
11	311
12	217
13	75
14	219
15	313
16	232
17	77
18	317
19	511
20	319
21	292
22	312
23	513
24	323
25	372
26	711
27	412
28	517
29	432
30	329
31	713
32	331
33	472
34	519
35	532
36	373
37	523
38	592
39	717
40	1111
41	612
42	413
43	433
44	719
45	672
46	473
47	712
48	1311
49	529
50	732
51	531
52	792
53	533

[22, 32, 33, 52, 72, 53, 73, 211, 55, 213, 311, 217, 75, 219, 313, 232, 77, 317, 511, 319, 292, 312, 513, 323, 372, 711, 412, 517, 432, 329, 713, 331, 472, 519, 532, 373, 523, 592, 717, 1111, 612, 413, 433, 719, 672, 473, 712, 1311, 529, 732, 531, 792, 533]

cp's OEIS Frontend

A106557 Largest number that can be obtained by concatenating the two factors of the n-th semiprime.

Table of values

List of values