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A218600 as a simple table

na(n)
00
11
22
34
47
512
621
738
868
9122
10220
11399
12729
131343
142493
154655
168727
1716405
1830901
1958319
20110298
21209098
22397407
23757296
241446945
252771951
265323982
2710250571
2819780122
2938243220
3074058513
31143592684
32278661808
33541110611
341051158027
352042539460
363969857205

[0,1,2,4,7,12,21,38,68,122,220,399,729,1343,2493,
 4655,8727,16405,30901,58319,110298,209098,397407,
 757296,1446945,2771951,5323982,10250571,19780122,
 38243220,74058513,143592684,278661808,541110611,
 1051158027,2042539460,3969857205]