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A220513 as a simple table

n a(n)
0 2
1 140
2 3042
3 38054
4 344212
5 2488260
6 15235620
7 81926240
8 396603536
9 1759312286
10 7246532360
11 27998586490
12 102294344881
13 355704104008
14 1183463874068
15 3784162891544
16 11672177600660
17 34840196162760
18 100912078549712
19 284295561826160

[2,140,3042,38054,344212,2488260,15235620,
 81926240,396603536,1759312286,7246532360,
 27998586490,102294344881,355704104008,
 1183463874068,3784162891544,11672177600660,
 34840196162760,100912078549712,284295561826160]

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Last modified September 3 16:12 EDT 2024. Contains 375672 sequences. (Running on oeis4.)