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A069835 as a simple table

n a(n)
0 1
1 4
2 22
3 136
4 886
5 5944
6 40636
7 281488
8 1968934
9 13875544
10 98365972
11 700701808
12 5011371964
13 35961808432
14 258805997752
15 1867175631136
16 13500088649734
17 97794850668952
18 709626281415076
19 5157024231645616
20 37528209137458516
21 273431636191026064
22 1994448720786816712

[1,4,22,136,886,5944,40636,281488,1968934,
 13875544,98365972,700701808,5011371964,
 35961808432,258805997752,1867175631136,
 13500088649734,97794850668952,709626281415076,
 5157024231645616,37528209137458516,
 273431636191026064,1994448720786816712]

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Last modified May 2 19:04 EDT 2024. Contains 372203 sequences. (Running on oeis4.)