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A135501 as a simple table

na(n)
00
10
21
32
44
513
642
7139
8506
91915
107558
1131092
12132170
13580466
142624545
1512190623
1658083923
17283346273
181413449148
197200961616
2037425264180
21198239674888
221069228024931
235867587726222
2432736878114805
25185570805235978

[0,0,1,2,4,13,42,139,506,1915,7558,31092,132170,
 580466,2624545,12190623,58083923,283346273,
 1413449148,7200961616,37425264180,198239674888,
 1069228024931,5867587726222,32736878114805,
 185570805235978]