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A302507 as a simple table

na(n)
00
18
232
3104
4320
5968
62912
78744
826240
978728
10236192
11708584
122125760
136377288
1419131872
1557395624
16172186880
17516560648
181549681952
194649045864
2013947137600
2141841412808
22125524238432
23376572715304
241129718145920
253389154437768
2610167463313312

[0,8,32,104,320,968,2912,8744,26240,78728,236192,
 708584,2125760,6377288,19131872,57395624,
 172186880,516560648,1549681952,4649045864,
 13947137600,41841412808,125524238432,376572715304,
 1129718145920,3389154437768,10167463313312]