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A261389 as a simple table

na(n)
01
16
230
3128
4486
51704
65604
717484
852206
9150118
10417696
111128984
122973476
137650720
1419272432
1547616568
16115570014
17275921460
18648771802
191503889488
203439990344
217770915816
2217349229908
2338306180052
2483694778556
25181052778078
26387976101432
27823939048560

[1,6,30,128,486,1704,5604,17484,52206,150118,
 417696,1128984,2973476,7650720,19272432,47616568,
 115570014,275921460,648771802,1503889488,
 3439990344,7770915816,17349229908,38306180052,
 83694778556,181052778078,387976101432,
 823939048560]