[seqfan] A039686 vs A147608

David Wilson davidwwilson at comcast.net
Thu Nov 22 05:40:31 CET 2012


Both A039686 and A147608 purport to be squares which are the 
concatenation of nonzero squares. However, A147608 has additional 
values, the first being a(10) = 9025.

If 9025 is interpretable as the concatenation of two nonzero squares, 
these would have to be 9 and 025. This is not how we normally 
concatenate decimal numerals with values 9 and 25. I propose either kill 
A147608 as a corrupt duplicate of A039686, or amend its description and 
include the example {9025,9,025} to highlight the difference between 
A039686 and A147608.

I have submitted a 1000-term b-file for A039686, and if A147608 is 
retained, I could submit a like b-file.



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