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A214940 as a simple table

na(n)
16
230
3150
4720
53480
616680
780040
8383520
91838160
108807400
1142202560
12202209720
13968880960
144642304520
1522243228680
16106576361760
17510651000360

[6,30,150,720,3480,16680,80040,383520,1838160,
 8807400,42202560,202209720,968880960,4642304520,
 22243228680,106576361760,510651000360]