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A002721 as a simple table

na(n)
01
112
2132
3847
43921
514506
645402
7124707
8308407
9699766
101477686
112936517
125540107
139993192
1417333536
1529048541
1647220357
1774703832
18115341952
19174223731
20257989821
21375191422
22536708382
23756232687
241050823851
251441543026
261954172962

[1,12,132,847,3921,14506,45402,124707,308407,
 699766,1477686,2936517,5540107,9993192,17333536,
 29048541,47220357,74703832,115341952,174223731,
 257989821,375191422,536708382,756232687,
 1050823851,1441543026,1954172962]