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A005028 as a simple table

n a(n)
3 1
4 2
5 4
6 12
7 33
8 102
9 312
10 1010
11 3256
12 10836
13 36094
14 122544
15 417150
16 1437712
17 4970904
18 17333772
19 60638124
20 213435264
21 753520804
22 2672606464
23 9505230397
24 33928264990
25 121400935184
26 435660446342
27 1566809204928
28 5648450745204
29 20402191885146
30 73842311224632

[1,2,4,12,33,102,312,1010,3256,10836,36094,122544,
 417150,1437712,4970904,17333772,60638124,
 213435264,753520804,2672606464,9505230397,
 33928264990,121400935184,435660446342,
 1566809204928,5648450745204,20402191885146,
 73842311224632]

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Last modified April 23 08:11 EDT 2024. Contains 371905 sequences. (Running on oeis4.)