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A099503 as a simple table

n a(n)
0 1
1 4
2 16
3 63
4 248
5 976
6 3841
7 15116
8 59488
9 234111
10 921328
11 3625824
12 14269185
13 56155412
14 220995824
15 869714111
16 3422701032
17 13469808304
18 53009519105
19 208615375388
20 820991693248
21 3230957253887
22 12715213640160
23 50039862867392

[1,4,16,63,248,976,3841,15116,59488,234111,921328,
 3625824,14269185,56155412,220995824,869714111,
 3422701032,13469808304,53009519105,208615375388,
 820991693248,3230957253887,12715213640160,
 50039862867392]

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Last modified June 16 15:04 EDT 2024. Contains 373430 sequences. (Running on oeis4.)