A037799 - OEIS

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A037799 as a simple table

n	a(n)
1	3
2	32
3	321
4	3210
5	32103
6	321032
7	3210321
8	32103210
9	321032103
10	3210321032
11	32103210321
12	321032103210
13	3210321032103
14	32103210321032
15	321032103210321
16	3210321032103210

[3,32,321,3210,32103,321032,3210321,32103210, 321032103,3210321032,32103210321,321032103210, 3210321032103,32103210321032,321032103210321, 3210321032103210]