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A276029 as a simple table

n a(n)
1 1
2 4
3 27
4 228
5 2226
6 23778
7 270693
8 3229106
9 39922172
10 507680620
11 6604676830
12 87549425068
13 1178880306174
14 16086844260290
15 222045139578443
16 3095457073064120
17 43529719213465854
18 616853383573066504
19 8801227720060618544
20 126344910516550743232

[1,4,27,228,2226,23778,270693,3229106,39922172,
 507680620,6604676830,87549425068,1178880306174,
 16086844260290,222045139578443,3095457073064120,
 43529719213465854,616853383573066504,
 8801227720060618544,126344910516550743232]

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Last modified January 19 11:05 EST 2022. Contains 350464 sequences. (Running on oeis4.)