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A261568 as a simple table

n a(n)
0 1
1 4
2 4
3 20
4 20
5 36
6 100
7 116
8 180
9 260
10 580
11 660
12 1044
13 1380
14 2020
15 3444
16 4340
17 6020
18 8260
19 11220
20 14740
21 23140
22 28196
23 38900
24 50420
25 67780
26 85956
27 114900
28 157140
29 197860
30 257060
31 331060
32 423540
33 540100
34 687620
35 864084
36 1145300
37 1406500
38 1789860
39 2231860

[1,4,4,20,20,36,100,116,180,260,580,660,1044,1380,
 2020,3444,4340,6020,8260,11220,14740,23140,28196,
 38900,50420,67780,85956,114900,157140,197860,
 257060,331060,423540,540100,687620,864084,1145300,
 1406500,1789860,2231860]

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Last modified December 9 13:50 EST 2019. Contains 329877 sequences. (Running on oeis4.)