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A099495 as a simple table

n a(n)
0 0
1 1
2 1
3 2
4 6
5 12
6 25
7 55
8 118
9 254
10 548
11 1179
12 2539
13 5470
14 11780
15 25370
16 54641
17 117681
18 253452
19 545866
20 1175642
21 2532005
22 5453235
23 11744748
24 25294914
25 54478198
26 117330859
27 252697979
28 544241040
29 1172143560
30 2524470640
31 5437006381

[0,1,1,2,6,12,25,55,118,254,548,1179,2539,5470,
 11780,25370,54641,117681,253452,545866,1175642,
 2532005,5453235,11744748,25294914,54478198,
 117330859,252697979,544241040,1172143560,
 2524470640,5437006381]

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Last modified May 6 21:20 EDT 2021. Contains 343587 sequences. (Running on oeis4.)