[seqfan] Composite numbers n such that digits of prime factors of n are either 4 or 9.
David Corneth
davidacorneth at gmail.com
Tue Sep 22 15:44:37 CEST 2020
I'm now editing "Composite numbers n such that digits of prime factors of n
are either 4 or 9." (A036319) which is a member of a family of at least
24 sequences. There's no wiki for that family (right?). Do I add the 24
sequences as an xref or would we (an expert on that) make a new
wikipage for it?
Best,
David
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