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A251740 as a simple table

na(n)
00
10
20
30
40
51
60
70
81
92
104
118
1216
1332
1463
15126
16252
17503
181004
192004
204000
217984
2215936
2331809
2463492
25126732
26252961
27504918
281007832
292011664
304015344
318014752
3215997695
3331931898
3463737064
35127221167
36253937416
37506867000
381011722336
392019429328

[0,0,0,0,0,1,0,0,1,2,4,8,16,32,63,126,252,503,
 1004,2004,4000,7984,15936,31809,63492,126732,
 252961,504918,1007832,2011664,4015344,8014752,
 15997695,31931898,63737064,127221167,253937416,
 506867000,1011722336,2019429328]