A048553 - OEIS

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A048553 as a simple table

n	a(n)
0	11
1	113
2	11311
3	113111
4	1131113
5	11311133
6	1131113353
7	113111335313
8	11311133531339
9	113111335313399
10	1131113353133993
11	113111335313399321
12	11311133531339932153
13	1131113353133993215379
14	113111335313399321537911

[11,113,11311,113111,1131113,11311133,1131113353, 113111335313,11311133531339,113111335313399, 1131113353133993,113111335313399321, 11311133531339932153,1131113353133993215379, 113111335313399321537911]