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A216491 as a simple table

na(n)
012
160
2300
31500
47500
537500
6187500
7937500
84687500
923437500
10117187500
11585937500
122929687500
1314648437500
1473242187500
15366210937500
161831054687500
179155273437500
1845776367187500
19228881835937500
201144409179687500
215722045898437500
2228610229492187500

[12,60,300,1500,7500,37500,187500,937500,4687500,
 23437500,117187500,585937500,2929687500,
 14648437500,73242187500,366210937500,
 1831054687500,9155273437500,45776367187500,
 228881835937500,1144409179687500,5722045898437500,
 28610229492187500]