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A251084 as a simple table

n a(n)
1 420
2 1306
3 2362
4 4718
5 8512
6 15780
7 28616
8 52934
9 98550
10 186788
11 358250
12 695798
13 1363076
14 2688996
15 5329268
16 10596902
17 21115770
18 42135172
19 84151526
20 168159190
21 336144664
22 672082436
23 1343919232
24 2687549958
25 5374762142
26 10749132260

[420,1306,2362,4718,8512,15780,28616,52934,98550,
 186788,358250,695798,1363076,2688996,5329268,
 10596902,21115770,42135172,84151526,168159190,
 336144664,672082436,1343919232,2687549958,
 5374762142,10749132260]

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Last modified February 7 10:30 EST 2023. Contains 360115 sequences. (Running on oeis4.)