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A205817 as a simple table

n a(n)
1 66
2 216
3 714
4 2430
5 8274
6 28242
7 96402
8 329130
9 1123698
10 3836538
11 13098738
12 44721882
13 152690034
14 521316378
15 1779885426
16 6076908954
17 20747864946
18 70837641882
19 241854837618
20 825744066714
21 2819266591602
22 9625578232986

[66,216,714,2430,8274,28242,96402,329130,1123698,
 3836538,13098738,44721882,152690034,521316378,
 1779885426,6076908954,20747864946,70837641882,
 241854837618,825744066714,2819266591602,
 9625578232986]

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Last modified April 23 13:11 EDT 2024. Contains 371913 sequences. (Running on oeis4.)