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A178874 as a simple table

na(n)
00
11
24
320
498
5489
62442
712208
861036
9305177
101525880
117629396
1238146974
13190734865
14953674318
154768371584
1623841857912
17119209289553
18596046447756
192980232238772
2014901161193850
2174505805969241
22372529029846194

[0,1,4,20,98,489,2442,12208,61036,305177,1525880,
 7629396,38146974,190734865,953674318,4768371584,
 23841857912,119209289553,596046447756,
 2980232238772,14901161193850,74505805969241,
 372529029846194]