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A098531 as a simple table

na(n)
00
11
22
334
4277
53402
636170
7407463
84491564
949926988
10553211363
116137270812
1268054635036
13754774491429
148370420537086
1592830050637086
161029498223070793
1711417322172518550
18126619992693837974
191404237451180502875
2015573231068749231000

[0,1,2,34,277,3402,36170,407463,4491564,49926988,
 553211363,6137270812,68054635036,754774491429,
 8370420537086,92830050637086,1029498223070793,
 11417322172518550,126619992693837974,
 1404237451180502875,15573231068749231000]