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A301874 as a simple table

n a(n)
0 1
1 1
2 4
3 11
4 27
5 64
6 156
7 345
8 779
9 1706
10 3665
11 7742
12 16207
13 33300
14 67830
15 136526
16 271969
17 536588
18 1049801
19 2035620
20 3917547
21 7482738
22 14192358
23 26738962
24 50062081
25 93158467
26 172366532
27 317166618
28 580542738
29 1057269629
30 1916174666

[1,1,4,11,27,64,156,345,779,1706,3665,7742,16207,
 33300,67830,136526,271969,536588,1049801,2035620,
 3917547,7482738,14192358,26738962,50062081,
 93158467,172366532,317166618,580542738,1057269629,
 1916174666]

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Last modified April 6 14:08 EDT 2020. Contains 333276 sequences. (Running on oeis4.)