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A208689 as a simple table

n a(n)
1 6
2 36
3 78
4 282
5 768
6 2430
7 7086
8 21588
9 64230
10 193554
11 579264
12 1740054
13 5216502
14 15655428
15 46956702
16 140885610
17 422631744
18 1267935822
19 3803741790
20 11411331636
21 34233822966
22 102701747106
23 308104791168
24 924315101862
25 2772944127078

[6,36,78,282,768,2430,7086,21588,64230,193554,
 579264,1740054,5216502,15655428,46956702,
 140885610,422631744,1267935822,3803741790,
 11411331636,34233822966,102701747106,308104791168,
 924315101862,2772944127078]

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Last modified February 4 10:56 EST 2023. Contains 360053 sequences. (Running on oeis4.)