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A003230 as a simple table

n a(n)
0 1
1 4
2 11
3 28
4 67
5 152
6 335
7 724
8 1539
9 3232
10 6727
11 13900
12 28555
13 58392
14 118959
15 241604
16 489459
17 989520
18 1997015
19 4024508
20 8100699
21 16289032
22 32726655
23 65705268
24 131837763
25 264399936
26 530028199
27 1062139180
28 2127809963

[1,4,11,28,67,152,335,724,1539,3232,6727,13900,
 28555,58392,118959,241604,489459,989520,1997015,
 4024508,8100699,16289032,32726655,65705268,
 131837763,264399936,530028199,1062139180,
 2127809963]

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Last modified October 18 04:57 EDT 2019. Contains 328145 sequences. (Running on oeis4.)