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A218923 as a simple table

n a(n)
0 1
1 1
2 3
3 11
4 68
5 262
6 2261
7 14032
8 176245
9 1821103
10 30883491
11 415843982
12 10779423937
13 177718085432 

[1,1,3,11,68,262,2261,14032,176245,1821103,
 30883491,415843982,10779423937,177718085432]

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)