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A006013 as a simple table

n a(n)
0 1
1 2
2 7
3 30
4 143
5 728
6 3876
7 21318
8 120175
9 690690
10 4032015
11 23841480
12 142498692
13 859515920
14 5225264024
15 31983672534
16 196947587823
17 1219199353190
18 7583142491925
19 47365474641870
20 296983176369495
21 1868545312633440
22 11793499763070480

[1,2,7,30,143,728,3876,21318,120175,690690,
 4032015,23841480,142498692,859515920,5225264024,
 31983672534,196947587823,1219199353190,
 7583142491925,47365474641870,296983176369495,
 1868545312633440,11793499763070480]

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Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)