A186868 - OEIS

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A186868 as a simple table

n	a(n)
1	171
2	2121
3	24414
4	285724
5	3409112
6	40893800
7	492154924
8	5938127608
9	71755699992
10	868144018572
11	10511898062464
12	127364674658272
13	1543896563706688
14	18721690171445596
15	227085751983499944
16	2755034034648413220

[171,2121,24414,285724,3409112,40893800,492154924, 5938127608,71755699992,868144018572, 10511898062464,127364674658272,1543896563706688, 18721690171445596,227085751983499944, 2755034034648413220]