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A218959 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 7
5 31
6 211
7 1156
8 5419
9 40027
10 348331
11 3204796
12 38422891
13 467645179 

[1,1,1,4,7,31,211,1156,5419,40027,348331,3204796,
 38422891,467645179]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)