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A053809 as a simple table

na(n)
01
16
221
357
4133
5281
6554
71039
81878
93302
105686
119638
1216143
1326796
1444179
1572471
16118435
17193015
18313920
19509805
20827036
211340636
222171996
233517532
245695053
259218786
2614920769
2724147269
2839076593
2963233317
30102320326

[1,6,21,57,133,281,554,1039,1878,3302,5686,9638,
 16143,26796,44179,72471,118435,193015,313920,
 509805,827036,1340636,2171996,3517532,5695053,
 9218786,14920769,24147269,39076593,63233317,
 102320326]