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A221414 as a simple table

na(n)
10
210
30
4150
50
62250
70
833750
90
10506250
110
127593750
130
14113906250
150
161708593750
170
1825628906250
190
20384433593750
210
225766503906250
230
2486497558593750
250
261297463378906250
270
2819461950683593750
290
30291929260253906250
310

[0,10,0,150,0,2250,0,33750,0,506250,0,7593750,0,
 113906250,0,1708593750,0,25628906250,0,
 384433593750,0,5766503906250,0,86497558593750,0,
 1297463378906250,0,19461950683593750,0,
 291929260253906250,0]