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A177122 as a simple table

na(n)
01
16
215
370
4325
51721
69449
754208
8318943
91918427
1011731931
1172746099
12456238871
132889149141
1418447220199
15118630723058
16767675233277
174995186818805
1832662752627705
19214514289725729
201414397208516269

[1,6,15,70,325,1721,9449,54208,318943,1918427,
 11731931,72746099,456238871,2889149141,
 18447220199,118630723058,767675233277,
 4995186818805,32662752627705,214514289725729,
 1414397208516269]