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A219398 as a simple table

n a(n)
1 4
2 4
3 16
4 43
5 122
6 345
7 979
8 2791
9 7936
10 22540
11 64031
12 181974
13 517221
14 1469927
15 4177203
16 11870804
17 33735384
18 95872371
19 272457370
20 774287065
21 2200420843
22 6253312335
23 17771112208
24 50503204860
25 143523553079
26 407875327102

[4,4,16,43,122,345,979,2791,7936,22540,64031,
 181974,517221,1469927,4177203,11870804,33735384,
 95872371,272457370,774287065,2200420843,
 6253312335,17771112208,50503204860,143523553079,
 407875327102]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)