A116874 - OEIS

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A116874 as a simple table

n	a(n)
0	1
1	1
2	6
3	76
4	1336
5	27696
6	631776
7	15327936
8	388158336
9	10143429376
10	271514492416
11	7406771137536
12	205171931723776
13	5755684861259776
14	163186022760308736
15	4668631322653802496
16	134608711249014521856

[1,1,6,76,1336,27696,631776,15327936,388158336, 10143429376,271514492416,7406771137536, 205171931723776,5755684861259776, 163186022760308736,4668631322653802496, 134608711249014521856]