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A237699 as a simple table

na(n)
14700
239236
3333508
43004030
526578184
6236841050
72109752772
818967505282
9169027123272
101509396722124
1113489906100708
12120997556161304
131080200848895788
149651096798463826
1586312065065972436
16773073801408693908

[4700,39236,333508,3004030,26578184,236841050,
 2109752772,18967505282,169027123272,1509396722124,
 13489906100708,120997556161304,1080200848895788,
 9651096798463826,86312065065972436,
 773073801408693908]