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A093967 as a simple table

n a(n)
0 0
1 1
2 4
3 15
4 48
5 145
6 420
7 1183
8 3264
9 8865
10 23780
11 63151
12 166320
13 434993
14 1130948
15 2925375
16 7533312
17 19323713
18 49395780
19 125877071
20 319888560
21 810893265
22 2050891876
23 5176349663
24 13040153280
25 32793453025
26 82337215012
27 206424991215

[0,1,4,15,48,145,420,1183,3264,8865,23780,63151,
 166320,434993,1130948,2925375,7533312,19323713,
 49395780,125877071,319888560,810893265,2050891876,
 5176349663,13040153280,32793453025,82337215012,
 206424991215]

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Last modified April 20 00:26 EDT 2024. Contains 371798 sequences. (Running on oeis4.)