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A220880 as a simple table

n a(n)
0 1
1 2
2 4
3 9
4 25
5 95
6 552
7 5460
8 100708
9 3718353
10 289725508
11 49513793525
12 19089032278260
13 16951604697397301
14 35231087224279091309
15 173550485517380958360610
16 2047581288200721764035942913

[1,2,4,9,25,95,552,5460,100708,3718353,289725508,
 49513793525,19089032278260,16951604697397301,
 35231087224279091309,173550485517380958360610,
 2047581288200721764035942913]

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Last modified April 24 09:42 EDT 2024. Contains 371935 sequences. (Running on oeis4.)