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A051927 as a simple table

n a(n)
0 3
1 1
2 7
3 13
4 35
5 81
6 199
7 477
8 1155
9 2785
10 6727
11 16237
12 39203
13 94641
14 228487
15 551613
16 1331715
17 3215041
18 7761799
19 18738637
20 45239075
21 109216785
22 263672647
23 636562077
24 1536796803
25 3710155681
26 8957108167
27 21624372013
28 52205852195

[3,1,7,13,35,81,199,477,1155,2785,6727,16237,
 39203,94641,228487,551613,1331715,3215041,7761799,
 18738637,45239075,109216785,263672647,636562077,
 1536796803,3710155681,8957108167,21624372013,
 52205852195]

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Last modified February 27 09:20 EST 2020. Contains 332301 sequences. (Running on oeis4.)