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A245247 as a simple table

n a(n)
0 1
1 1
2 5
3 30
4 255
5 2880
6 39495
7 640800
8 12048225
9 257203200
10 6146830125
11 162636676800
12 4719436701375
13 149035892832000
14 5088353594517375
15 186769650799200000
16 7334368923555410625
17 306830158711872000000
18 13623286425863528263125
19 639832207565577018240000

[1,1,5,30,255,2880,39495,640800,12048225,
 257203200,6146830125,162636676800,4719436701375,
 149035892832000,5088353594517375,
 186769650799200000,7334368923555410625,
 306830158711872000000,13623286425863528263125,
 639832207565577018240000]

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Last modified March 28 14:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)