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A023000 as a simple table

na(n)
00
11
28
357
4400
52801
619608
7137257
8960800
96725601
1047079208
11329554457
122306881200
1316148168401
14113037178808
15791260251657
165538821761600
1738771752331201
18271402266318408
191899815864228857
2013298711049602000

[0,1,8,57,400,2801,19608,137257,960800,6725601,
 47079208,329554457,2306881200,16148168401,
 113037178808,791260251657,5538821761600,
 38771752331201,271402266318408,1899815864228857,
 13298711049602000]