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A230731 as a simple table

n a(n)
1 0
2 0
3 0
4 30
5 260
6 2790
7 32094
8 376934
9 4362078
10 50291874
11 579992382
12 6692484558
13 77225878898
14 891066286478
15 10281304434902
16 118628145745586
17 1368763636313926
18 15793166930559638
19 182225790213877210

[0,0,0,30,260,2790,32094,376934,4362078,50291874,
 579992382,6692484558,77225878898,891066286478,
 10281304434902,118628145745586,1368763636313926,
 15793166930559638,182225790213877210]

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Last modified April 19 13:40 EDT 2024. Contains 371792 sequences. (Running on oeis4.)