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A083440 as a simple table

n a(n)
1 1
2 11
3 111
4 1111
5 10301
6 102201
7 1005001
8 10033001
9 100070001
10 1000440001
11 10000900001
12 100005500001
13 1000019100001
14 10000066000001
15 100000292000001
16 1000000770000001
17 10000003930000001
18 100000008800000001

[1,11,111,1111,10301,102201,1005001,10033001,
 100070001,1000440001,10000900001,100005500001,
 1000019100001,10000066000001,100000292000001,
 1000000770000001,10000003930000001,
 100000008800000001]

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Last modified April 6 12:48 EDT 2020. Contains 333276 sequences. (Running on oeis4.)