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A169721 as a simple table

n a(n)
0 1
1 16
2 100
3 484
4 2116
5 8836
6 36100
7 145924
8 586756
9 2353156
10 9424900
11 37724164
12 150945796
13 603881476
14 2415722500
15 9663283204
16 38653919236
17 154617249796
18 618472144900
19 2473894871044
20 9895592067076
21 39582393434116
22 158329624068100
23 633318596935684

[1,16,100,484,2116,8836,36100,145924,586756,
 2353156,9424900,37724164,150945796,603881476,
 2415722500,9663283204,38653919236,154617249796,
 618472144900,2473894871044,9895592067076,
 39582393434116,158329624068100,633318596935684]

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Last modified October 17 18:19 EDT 2018. Contains 316292 sequences. (Running on oeis4.)