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A026997 as a simple table

n a(n)
1 1
2 6
3 35
4 168
5 926
6 4294
7 23224
8 106690
9 571926
10 2617886
11 13965688
12 63815684
13 339452265
14 1549699466
15 8228066295
16 37543939462
17 199095075169
18 908167940082
19 4812012405883
20 21945589904716
21 116213845733553
22 529936445158768
23 2805163046954295
24 12790521159853090
25 67685654170211481

[1,6,35,168,926,4294,23224,106690,571926,2617886,
 13965688,63815684,339452265,1549699466,8228066295,
 37543939462,199095075169,908167940082,
 4812012405883,21945589904716,116213845733553,
 529936445158768,2805163046954295,
 12790521159853090,67685654170211481]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)