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A304220 as a simple table

n a(n)
1 21
2 103
3 93
4 190
5 509
6 1628
7 4263
8 11307
9 32315
10 89108
11 241808
12 671482
13 1860876
14 5112838
15 14112560
16 39021398
17 107604674
18 296850358
19 819720184
20 2262238142
21 6242240358
22 17229841514
23 47554661392
24 131237610194
25 362206032762

[21,103,93,190,509,1628,4263,11307,32315,89108,
 241808,671482,1860876,5112838,14112560,39021398,
 107604674,296850358,819720184,2262238142,
 6242240358,17229841514,47554661392,131237610194,
 362206032762]

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Last modified July 24 11:17 EDT 2021. Contains 346273 sequences. (Running on oeis4.)