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A135030 as a simple table

na(n)
00
11
26
338
4240
51516
69576
760488
8382080
92413456
1015244896
1196296288
12608267520
133842197696
1424269721216
15153302722688
16968355778560
176116740116736
1838637152257536
19244056393778688
201541612667187200

[0,1,6,38,240,1516,9576,60488,382080,2413456,
 15244896,96296288,608267520,3842197696,
 24269721216,153302722688,968355778560,
 6116740116736,38637152257536,244056393778688,
 1541612667187200]