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A107283 as a simple table

n a(n)
0 2
1 5
2 16
3 59
4 254
5 1297
6 7820
7 54791
8 438394
9 3945629
10 39456392
11 434020435
12 5208245366
13 67707189929
14 947900659204
15 14218509888287
16 227496158212850
17 3867434689618741
18 69613824413137664
19 1322662663849615979
20 26453253276992319982
21 555518318816838720065

[2,5,16,59,254,1297,7820,54791,438394,3945629,
 39456392,434020435,5208245366,67707189929,
 947900659204,14218509888287,227496158212850,
 3867434689618741,69613824413137664,
 1322662663849615979,26453253276992319982,
 555518318816838720065]

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Last modified May 23 04:59 EDT 2019. Contains 323508 sequences. (Running on oeis4.)