[seqfan] Re: Knife numbers

[Eric Angelini]

You're right, Frank, of course!

Catapulté de mon aPhone

> Le 20 sept. 2014 à 23:38, "Frank Adams-Watters" <franktaw at netscape.net> a écrit :
> 
> Sorry, not 101, but 102 would be.
> 
> Franklin T. Adams-Watters
> 
> -----Original Message-----
> From: Frank Adams-Watters <franktaw at netscape.net>
> 
> 
> You have to specify that you can't cut before a zero. Otherwise, e.g.,
> 101 would be included.
> 
> This suggests that you should omit 10, 20, 30, ,,, Allowing them makes
> the definition more complex. And having every multiple of 10 be in the
> sequence is not very interesting.
> 
> Note that by the definition you are using, 100, divisible by 10 + 0,
> should be in the sequence.
> 
> Franklin T. Adams-Watters
> 
> -----Original Message-----
> From: Eric Angelini <Eric.Angelini at kntv.be>
> To: Sequence Discussion list <seqfan at list.seqfan.eu>
> Sent: Sat, Sep 20, 2014 3:58 pm
> Subject: [seqfan] Knife numbers
> 
> 
> 
> Hello SeqFans,
> If I'm not wrong, the "Knife numbers"
> (as we might call them) are not in the
> database.
> 
> A "knife number" K can be divided
> in two chunks P and Q such that P+Q
> divide K.
> 
> K = 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63,
> 70, 72,
> 80, 81, 84, 90, 105, 108, 110, 120, 126, 130, 132,...
> 
> Examples:
> 12 is divisible by 1+2 (result = 4)
> 126 is divisible by 12+6 (result = 7)
> 132 is divisible by 1+32 (result = 4)
> ...
> Best,
> É.
> 
> 
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