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A253337 as a simple table

na(n)
11928
211581
3100512
4722826
55136108
632653458
7237047904
81348380871
98419903755
1034660596075
11237311962480
12870344555637
133971606587854
148571859069436
1548627137874733
16107516598517821
17328229525693772

[1928,11581,100512,722826,5136108,32653458,
 237047904,1348380871,8419903755,34660596075,
 237311962480,870344555637,3971606587854,
 8571859069436,48627137874733,107516598517821,
 328229525693772]