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A218175 as a simple table

na(n)
14
228
3192
4956
55494
630888
7172038
8964828
95400158
1030225794
11169223054
12947302656
135303071898
1429687164126
15166191023656
16930351759572
175208189255764
1829155886563482
19163217149535782
20913703559802622

[4,28,192,956,5494,30888,172038,964828,5400158,
 30225794,169223054,947302656,5303071898,
 29687164126,166191023656,930351759572,
 5208189255764,29155886563482,163217149535782,
 913703559802622]