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A020509 as a simple table

n a(n)
0 -10
1 -11
2 -9
3 91
4 101
5 9091
6 111
7 909091
8 10001
9 999001
10 11111
11 9090909091
12 9901
13 909090909091
14 1111111
15 109889011
16 100000001
17 9090909090909091
18 1001001
19 909090909090909091
20 99009901
21 1098900989011
22 11111111111

[-10,-11,-9,91,101,9091,111,909091,10001,999001,
 11111,9090909091,9901,909090909091,1111111,
 109889011,100000001,9090909090909091,1001001,
 909090909090909091,99009901,1098900989011,
 11111111111]

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Last modified May 21 12:49 EDT 2024. Contains 372736 sequences. (Running on oeis4.)