[seqfan] Re: Proof of the A186080 conjecture

Matevž Markovič matevz.markovic.v at gmail.com
Sun Mar 6 23:12:07 CET 2011


Mr. Dale, you gave me the sequence of squares. My conjecture is:
(taken from http://oeis.org/A186080)

"If k^4 is a palindrome > 0, then k begins and ends with digit 1, all other
digits of k being 0."

Simmons verified it up to 10^14 (see the link on the A186080 page).

k^4 is a palindrome only for k = 1,11,101,1001,... (sequence taken from

I need help with the proof of the conjecture: A186080

Thank you for your time,

Matevž Markovič

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