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A207499 as a simple table

na(n)
125
2625
33355
417911
5122061
6804887
75715255
840046975
9287772089
102061595205
1114914823863
12107929360177
13784430935831
145706698690103
1541607085900821
16303627706072811
172218432129234439
1816220034510311323
19118680071632234053

[25,625,3355,17911,122061,804887,5715255,40046975,
 287772089,2061595205,14914823863,107929360177,
 784430935831,5706698690103,41607085900821,
 303627706072811,2218432129234439,
 16220034510311323,118680071632234053]