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A255688 as a simple table

n a(n)
0 1
1 3
2 15
3 90
4 579
5 3858
6 26262
7 181380
8 1265955
9 8906706
10 63058530
11 448716876
12 3206387790
13 22992276180
14 165364807308
15 1192393813320
16 8617219956003
17 62397513984210
18 452607991376490
19 3288138397237884
20 23921128800374874

[1,3,15,90,579,3858,26262,181380,1265955,8906706,
 63058530,448716876,3206387790,22992276180,
 165364807308,1192393813320,8617219956003,
 62397513984210,452607991376490,3288138397237884,
 23921128800374874]

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Last modified April 24 14:12 EDT 2024. Contains 371960 sequences. (Running on oeis4.)