A132930 - OEIS

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A132930 as a simple table

n	a(n)
1	1
2	13
3	134
4	1347
5	13476
6	1347612
7	13476128
8	1347612815
9	134761281513
10	13476128151318
11	1347612815131812
12	134761281513181228
13	13476128151318122814
14	1347612815131812281424
15	134761281513181228142424

[1,13,134,1347,13476,1347612,13476128,1347612815, 134761281513,13476128151318,1347612815131812, 134761281513181228,13476128151318122814, 1347612815131812281424,134761281513181228142424]