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A178841 as a simple table

na(n)
01
10
20
31
42
55
69
719
837
974
10148
11296
12591
131183
142366
154731
169463
1718926
1837852
1975704
20151408
21302816
22605633
231211265
242422530
254845060
269690121
2719380241
2838760482
2977520964
30155041928
31310083856
32620167712
331240335424
342480670848
354961341695
369922683391
3719845366782
3839690733564

[1,0,0,1,2,5,9,19,37,74,148,296,591,1183,2366,
 4731,9463,18926,37852,75704,151408,302816,605633,
 1211265,2422530,4845060,9690121,19380241,38760482,
 77520964,155041928,310083856,620167712,1240335424,
 2480670848,4961341695,9922683391,19845366782,
 39690733564]