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A219253 as a simple table

na(n)
11
215
3325
4195625
543959376
64106490625
7396606890625
825271617109376
983084112890625
1022661209212890625
111596879961787109376
123344565630081787109376
131795096118003159918212890625

[1,15,325,195625,43959376,4106490625,396606890625,
 25271617109376,83084112890625,22661209212890625,
 1596879961787109376,3344565630081787109376,
 1795096118003159918212890625]