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A028303 as a simple table

na(n)
01
10
21
31
42
52
65
77
814
921
1042
1166
12132
13214
14429
15715
161430
172431
184862
198398
2016796
2129393
2258786
23104006
24208012
25371450
26742900
271337220
282674440
294847422
309694845
3117678835
3235357670
3364822395
34129644790
35238819350
36477638700
37883631595
381767263190

[1,0,1,1,2,2,5,7,14,21,42,66,132,214,429,715,1430,
 2431,4862,8398,16796,29393,58786,104006,208012,
 371450,742900,1337220,2674440,4847422,9694845,
 17678835,35357670,64822395,129644790,238819350,
 477638700,883631595,1767263190]