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A278405 as a simple table

na(n)
01
11
22
319
4110
5476
62477
715093
886830
9485290
102826902
1116857116
12100034453
13594833357
143574477090
1521611465819
16130955824174
17796195223398
184860425688176
1929760574848750
20182655048136510
211123720751229858
226929124085148938
2342811398244528788

[1,1,2,19,110,476,2477,15093,86830,485290,2826902,
 16857116,100034453,594833357,3574477090,
 21611465819,130955824174,796195223398,
 4860425688176,29760574848750,182655048136510,
 1123720751229858,6929124085148938,
 42811398244528788]