A097192 - OEIS

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A097192 as a simple table

n	a(n)
0	1
1	24
2	612
3	15912
4	417690
5	11027016
6	292215924
7	7764594552
8	206732329947
9	5512862131920
10	147193418922264
11	3934078651195056
12	105236603919467748
13	2817102935690367408
14	75458114348849127000
15	2022277464549156603600

[1,24,612,15912,417690,11027016,292215924, 7764594552,206732329947,5512862131920, 147193418922264,3934078651195056, 105236603919467748,2817102935690367408, 75458114348849127000,2022277464549156603600]