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A131991 as a simple table

n a(n)
1 15
2 40
3 156
4 400
5 1464
6 2380
7 5220
8 7240
9 12720
10 25260
11 30784
12 52060
13 70644
14 81400
15 106080
16 151740
17 208920
18 230764
19 305320
20 363024
21 394420
22 499360
23 578760
24 712980
25 922180
26 1040604
27 1103440
28 1236600
29 1307020
30 1455780
31 2064640
32 2265384

[15,40,156,400,1464,2380,5220,7240,12720,25260,
 30784,52060,70644,81400,106080,151740,208920,
 230764,305320,363024,394420,499360,578760,712980,
 922180,1040604,1103440,1236600,1307020,1455780,
 2064640,2265384]

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Last modified May 3 19:17 EDT 2024. Contains 372222 sequences. (Running on oeis4.)