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A258951 as a simple table

na(n)
180000
2213920
3605904
41724976
54964896
614867112
744522440
8134384448
9410930808
101260815840
113895391352
1212098662888
1337721194992
14118143270584
15371262795592
161170540703680
173702141701352
1811740406194384
1937331111667992

[80000,213920,605904,1724976,4964896,14867112,
 44522440,134384448,410930808,1260815840,
 3895391352,12098662888,37721194992,118143270584,
 371262795592,1170540703680,3702141701352,
 11740406194384,37331111667992]