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A042513 as a simple table

na(n)
01
156
23137
3175728
49843905
5551434408
630890170753
71730400996576
896933345979009
95429997775821080
10304176808791959489
1117039331290125552464
12954506729055822897473
1353469416158416207810952
142995241811600363460310785
15167787010865778769985214912

[1,56,3137,175728,9843905,551434408,30890170753,
 1730400996576,96933345979009,5429997775821080,
 304176808791959489,17039331290125552464,
 954506729055822897473,53469416158416207810952,
 2995241811600363460310785,
 167787010865778769985214912]