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A229644 as a simple table

n a(n)
0 1
1 4
2 28
3 244
4 2396
5 25324
6 281140
7 3232352
8 38151196
9 459594316
10 5628197948
11 69859456440
12 876985904276
13 11115789165888
14 142066687799680
15 1828884017527504
16 23694360858872604
17 308714491495346028
18 4042605442981407388
19 53178663502737007352

[1,4,28,244,2396,25324,281140,3232352,38151196,
 459594316,5628197948,69859456440,876985904276,
 11115789165888,142066687799680,1828884017527504,
 23694360858872604,308714491495346028,
 4042605442981407388,53178663502737007352]

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)