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A063840 as a simple table

n a(n)
1 1
2 18
3 28
4 40
5 84
6 120
7 208
8 372
9 424
10 552
11 624
12 900
13 1152
14 1848
15 2784
16 3904
17 4488
18 4992
19 7448
20 7896
21 9120
22 11712
23 13720
24 14280
25 19920
26 22344
27 26040
28 27144
29 37920
30 41160
31 52920
32 88920
33 107100
34 132480
35 186732
36 195300
37 208152
38 240240
39 243432

[1,18,28,40,84,120,208,372,424,552,624,900,1152,
 1848,2784,3904,4488,4992,7448,7896,9120,11712,
 13720,14280,19920,22344,26040,27144,37920,41160,
 52920,88920,107100,132480,186732,195300,208152,
 240240,243432]

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Last modified December 5 03:31 EST 2020. Contains 338943 sequences. (Running on oeis4.)