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A199903 as a simple table

n a(n)
1 1
2 4
3 12
4 24
5 82
6 232
7 654
8 2044
9 6096
10 18564
11 57500
12 177032
13 550098
14 1715956
15 5359158
16 16799508
17 52760640
18 165976252
19 523094304
20 1650781728
21 5216112586
22 16501009804
23 52252555938
24 165618780196
25 525388548976
26 1667965025692

[1,4,12,24,82,232,654,2044,6096,18564,57500,
 177032,550098,1715956,5359158,16799508,52760640,
 165976252,523094304,1650781728,5216112586,
 16501009804,52252555938,165618780196,525388548976,
 1667965025692]

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Last modified May 8 08:13 EDT 2024. Contains 372319 sequences. (Running on oeis4.)