[seqfan] Re: sigma(odd square) = odd square

[Olivier Gerard]

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---------- Forwarded message ----------
From: Letsko Vladimir <val-etc at yandex.ru>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Cc:
Date: Sat, 13 Feb 2016 23:58:23 +0300
Subject: Re: [seqfan] sigma(odd square) = odd square
Hello, Zak!

13.02.2016, 23:05, "Zak Seidov" <zakseidov at mail.ru>:


Are 1 and 81 the only odd squares with odd square sigma:
sigma(1)=1 and sigma(81)=121?

See odd terms of Everest sequence (A008848)

-- 
Best regards,
Vladimir Letsko