[seqfan] Re: |a-b| divides concatenation [ab]
Jack Brennen
jfb at brennen.net
Mon Sep 20 19:28:21 CEST 2010
Eric Angelini wrote:
>
> If we drop the "strictly increasing" constraint, we'll get T (which
> is an incredible nightmare to calculate by hand):
>
> T = 1, 144, 43, 134, 108, 9, 6, 4, 158, ...
> 1st dif: 143 101 91 26 99 3 2 154 ...
>
Not easy by hand, I guess, because I think you're off on the fourth
term, and everything past that is bogus then. :)
I'm assuming that the sequence T and the difference sequence are
supposed to be disjoint, and that each subsequent term of T is the
smallest possible value that preserves this property? Assuming that,
I get (with computer assistance):
1 144 43 120 80 60 5 390 87 58 56 42 9 6 160
143 101 77 40 20 55 385 303 29 2 14 33 3 154
I think I have 450 terms of T, but I'll hold off on posting them
until I get confirmation that the sequence looks right through
those first 15 terms.
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