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A027899 as a simple table

n a(n)
1 1
2 11
3 23
4 121
5 253
6 2783
7 4093
8 8779
9 45023
10 94139
11 96569
12 201917
13 495253
14 1035529
15 1062259
16 2221087
17 11390819
18 24431957
19 35932447
20 395256917
21 826446281
22 4347826087
23 9090909091
24 100000000001

[1,11,23,121,253,2783,4093,8779,45023,94139,96569,
 201917,495253,1035529,1062259,2221087,11390819,
 24431957,35932447,395256917,826446281,4347826087,
 9090909091,100000000001]

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Last modified October 23 11:48 EDT 2019. Contains 328345 sequences. (Running on oeis4.)