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A140770 as a simple table

n a(n)
1 1
2 16
3 289
4 4624
5 67081
6 902500
7 11471769
8 139570596
9 1640493009
10 18754206916
11 209576262025
12 2298031637476
13 24798178969729
14 263962539461776
15 2776718023652329
16 28909790108979264
17 298278580556192769
18 3052900712959977636
19 31023767417676585561
20 313247762072931012804

[1,16,289,4624,67081,902500,11471769,139570596,
 1640493009,18754206916,209576262025,2298031637476,
 24798178969729,263962539461776,2776718023652329,
 28909790108979264,298278580556192769,
 3052900712959977636,31023767417676585561,
 313247762072931012804]

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Last modified November 30 08:16 EST 2021. Contains 349419 sequences. (Running on oeis4.)