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A100068 as a simple table

n a(n)
0 1
1 3
2 11
3 36
4 123
5 408
6 1370
7 4560
8 15235
9 50760
10 169326
11 564336
12 1881582
13 6271632
14 20907156
15 69689376
16 232304355
17 774343560
18 2581169510
19 8603882160
20 28679699578
21 95598937008
22 318663476076
23 1062211351776
24 3540705857998
25 11802351958608
26 39341178395660
27 131137257852000

[1,3,11,36,123,408,1370,4560,15235,50760,169326,
 564336,1881582,6271632,20907156,69689376,
 232304355,774343560,2581169510,8603882160,
 28679699578,95598937008,318663476076,
 1062211351776,3540705857998,11802351958608,
 39341178395660,131137257852000]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)