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A207786 as a simple table

n a(n)
1 9
2 81
3 253
4 791
5 2173
6 5241
7 12567
8 28101
9 61397
10 131083
11 272789
12 560651
13 1133751
14 2266643
15 4487109
16 8799557
17 17130019
18 33113221
19 63623053
20 121586791
21 231212705
22 437760595
23 825496887
24 1550995293
25 2904417145
26 5422206945
27 10094193051

[9,81,253,791,2173,5241,12567,28101,61397,131083,
 272789,560651,1133751,2266643,4487109,8799557,
 17130019,33113221,63623053,121586791,231212705,
 437760595,825496887,1550995293,2904417145,
 5422206945,10094193051]

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Last modified April 23 02:23 EDT 2024. Contains 371906 sequences. (Running on oeis4.)