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A001891 as a simple table

na(n)
00
11
24
310
421
540
672
7125
8212
9354
10585
11960
121568
132553
144148
156730
1610909
1717672
1828616
1946325
2074980
21121346
22196369
23317760
24514176
25831985
261346212
272178250
283524517
295702824
309227400
3114930285
3224157748
3339088098
3463245913
35102334080
36165580064

[0,1,4,10,21,40,72,125,212,354,585,960,1568,2553,
 4148,6730,10909,17672,28616,46325,74980,121346,
 196369,317760,514176,831985,1346212,2178250,
 3524517,5702824,9227400,14930285,24157748,
 39088098,63245913,102334080,165580064]