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A053525 as a simple table

na(n)
01
10
21
34
423
5166
61437
714512
8167491
92174746
1031374953
11497909380
128619976719
13161667969646
143265326093109
1570663046421208
161631123626335707
1740004637435452866
181038860856732399105
1928476428717448349996
20821656049857815980455

[1,0,1,4,23,166,1437,14512,167491,2174746,
 31374953,497909380,8619976719,161667969646,
 3265326093109,70663046421208,1631123626335707,
 40004637435452866,1038860856732399105,
 28476428717448349996,821656049857815980455]