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A081463 as a simple table

na(n)
11
2102564
31012658227848
4105263157894736842
51014492753623188405797
61034482758620689655172413793
7102040816326530612244897959183673469387755
810112359550561797752808988764044943820224719
91016949152542372881355932203389830508474576271186440677966

[1,102564,1012658227848,105263157894736842,
 1014492753623188405797,
 1034482758620689655172413793,
 102040816326530612244897959183673469387755,
 10112359550561797752808988764044943820224719,
 10169491525423728813559322033898305084745762711864\
 40677966]