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A263987 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 14
5 28
6 164
7 328
8 2240
9 9970
10 63410
11 126820
12 1810514
13 3621028
14 31417838
15 294911038
16 3344414606
17 6688829212
18 121919523980
19 243839047960
20 5307482547686
21 56885719183654
22 468469574780468
23 936939149560936
24 33136077712470338
25 249693200433310492

[1,1,2,4,14,28,164,328,2240,9970,63410,126820,
 1810514,3621028,31417838,294911038,3344414606,
 6688829212,121919523980,243839047960,
 5307482547686,56885719183654,468469574780468,
 936939149560936,33136077712470338,
 249693200433310492]

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Last modified April 25 11:03 EDT 2024. Contains 371967 sequences. (Running on oeis4.)