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A081674 as a simple table

na(n)
00
11
26
329
4130
5561
62366
79829
840410
9164921
10669526
112707629
1210919090
1343942081
14176565486
15708653429
162841788170
1711388676041
1845619274246
19182670807229
20731264359650
212926800830801
2211712433499806
2346865424529029
24187508769705530
25750176293590361
263001128818666166

[0,1,6,29,130,561,2366,9829,40410,164921,669526,
 2707629,10919090,43942081,176565486,708653429,
 2841788170,11388676041,45619274246,182670807229,
 731264359650,2926800830801,11712433499806,
 46865424529029,187508769705530,750176293590361,
 3001128818666166]