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A101904 as a simple table

n a(n)
1 1
2 6
3 21
4 70
5 223
6 706
7 2235
8 7070
9 22360
10 70710
11 223606
12 707106
13 2236067
14 7071067
15 22360679
16 70710677
17 223606797
18 707106780
19 2236067976
20 7071067811
21 22360679774
22 70710678118
23 223606797749
24 707106781186
25 2236067977499

[1,6,21,70,223,706,2235,7070,22360,70710,223606,
 707106,2236067,7071067,22360679,70710677,
 223606797,707106780,2236067976,7071067811,
 22360679774,70710678118,223606797749,707106781186,
 2236067977499]

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Last modified March 23 05:36 EDT 2019. Contains 321422 sequences. (Running on oeis4.)