A166583 - OEIS

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A166583 as a simple table

n	a(n)
0	1
1	15
2	210
3	2940
4	41160
5	576240
6	8067360
7	112943040
8	1581202560
9	22136835840
10	309915701760
11	4338819824640
12	60743477544855
13	850408685626500
14	11905721598750525
15	166680102382220700
16	2333521433347076700

[1,15,210,2940,41160,576240,8067360,112943040, 1581202560,22136835840,309915701760,4338819824640, 60743477544855,850408685626500,11905721598750525, 166680102382220700,2333521433347076700]