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A154597 as a simple table

na(n)
00
11
215
3226
43405
551301
6772920
711645101
8175449435
92643386626
1039826248825
11600037119001
129040383033840
13136205782626601
142052127122432855
1530918112619119426
16465823816409224245
177018275358757483101
18105739954197771470760
191593117588325329544501

[0,1,15,226,3405,51301,772920,11645101,175449435,
 2643386626,39826248825,600037119001,9040383033840,
 136205782626601,2052127122432855,
 30918112619119426,465823816409224245,
 7018275358757483101,105739954197771470760,
 1593117588325329544501]