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A028069 as a simple table

n a(n)
0 1
1 28
2 510
3 7700
4 104951
5 1344168
6 16531180
7 197743000
8 2319239901
9 26813094308
10 306681461450
11 3479254697100
12 39224238812851
13 440041610610448
14 4917647821351320
15 54788913249014000
16 608931512071655801

[1,28,510,7700,104951,1344168,16531180,197743000,
 2319239901,26813094308,306681461450,3479254697100,
 39224238812851,440041610610448,4917647821351320,
 54788913249014000,608931512071655801]

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Last modified July 4 22:49 EDT 2022. Contains 355086 sequences. (Running on oeis4.)