[seqfan] Re: Revenant numbers

Giovanni Resta g.resta at iit.cnr.it
Thu Oct 24 08:09:17 CEST 2019


I added 3 further terms to the sequence: 517322161894, 774773248793, 
2675959368829.

517322161894 * 725760 = 375451732216189440

774773248793 * 348509952 = 270016187747732487936

2675959368829 * 3527193600 = 9438626759593688294400

Still searching, but no other up to 2.5*10^12.

Giovanni


Il 21/10/2019 19:58, Hans Havermann ha scritto:
> CWW: "The next term after 62227496 that doesn't contain a 0 in the product is 6886826188 with the product being 97488368868261888."
>
> When Eric suggested that his "gems" subsequence have images/products not containing any zeros, I thought he was being unduly restrictive. Ignoring products whose *final digit* is not zero reproduces his list and catches additional gems such as 3691262781 -> 803691262781568.
>
>
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