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A019308 as a simple table

na(n)
01
13
26
318
448
5144
6414
71242
83678
911034
1032958
1198874
12296208
13888624
142664630
157993890
1623977992
1771933976
18215790894
19647372682
201942085088
215826255264
2217478666918
2352436000754
24157307706054
25471923118162

[1,3,6,18,48,144,414,1242,3678,11034,32958,98874,
 296208,888624,2664630,7993890,23977992,71933976,
 215790894,647372682,1942085088,5826255264,
 17478666918,52436000754,157307706054,471923118162]