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A300390 as a simple table

na(n)
01
15
2227
315090
41182187
5101527596
69247179818
7877362665128
885783306955099
98582893111512001
10874542924575207352
1190437361732467946334
129467275300762187682554
131001309098267187214993056
14106836493655355495755649544
1511485688815900189437990930096
161242964338344397490958154292155

[1,5,227,15090,1182187,101527596,9247179818,
 877362665128,85783306955099,8582893111512001,
 874542924575207352,90437361732467946334,
 9467275300762187682554,1001309098267187214993056,
 106836493655355495755649544,
 11485688815900189437990930096,
 1242964338344397490958154292155]