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A027208 as a simple table

n a(n)
1 1
2 4
3 19
4 72
5 338
6 1289
7 6027
8 23117
9 107746
10 415058
11 1929383
12 7456777
13 34584731
14 134005510
15 620344059
16 2408498148
17 11131638368
18 43289074671
19 199800878749
20 778025282080
21 3586777011141
22 13982303458588
23 64394916131100
24 251261623174835
25 1156165698462868
26 4514741175877259

[1,4,19,72,338,1289,6027,23117,107746,415058,
 1929383,7456777,34584731,134005510,620344059,
 2408498148,11131638368,43289074671,199800878749,
 778025282080,3586777011141,13982303458588,
 64394916131100,251261623174835,1156165698462868,
 4514741175877259]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)