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A009972 as a simple table

n a(n)
0 1
1 28
2 784
3 21952
4 614656
5 17210368
6 481890304
7 13492928512
8 377801998336
9 10578455953408
10 296196766695424
11 8293509467471872
12 232218265089212416
13 6502111422497947648
14 182059119829942534144
15 5097655355238390956032

[1,28,784,21952,614656,17210368,481890304,
 13492928512,377801998336,10578455953408,
 296196766695424,8293509467471872,
 232218265089212416,6502111422497947648,
 182059119829942534144,5097655355238390956032]

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Last modified April 12 03:07 EDT 2021. Contains 342912 sequences. (Running on oeis4.)