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A169135 as a simple table

na(n)
01
126
2650
316250
4406250
510156250
6253906250
76347656250
8158691406250
93967285156250
1099182128906250
112479553222656250
1261988830566406250
131549720764160156250
1438743019104003906250
15968575477600097656250

[1,26,650,16250,406250,10156250,253906250,
 6347656250,158691406250,3967285156250,
 99182128906250,2479553222656250,61988830566406250,
 1549720764160156250,38743019104003906250,
 968575477600097656250]