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00:43
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Q: Hailstone numbers for 2^n-1 always adjacent by 1

ZellionThe hailstone number of each number in the form 2^n-1 when n>1 is, as stated on the OEIS by Alexandre Herrera, "a(2n) = 1 + a(2n-1) for n >= 2" where a(n) is the hailstone number of 2^n-1 OEIS A193688. Simply Put the hailstone numbers of integers one less than a power of 2 come in groups of 2 or ...

 
1 hour later…
01:51
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Q: Are these 3 Collatz statements sufficient for a proof?

dcromleyMy "proof" :) uses the graph-tree approach. It seems to me that proving these 3 statements are sufficient: 1) the graph is connected. 2) the graph contains all numbers (requires connectivity). 3) the graph is acyclic. I am realistic, but my logic seems valid to me for all 3 statements. ...

 
11 hours later…
12:41
[ SmokeDetector | MS ] No whitespace in body, no whitespace in title (168): fsggdshfdhjjhhgjyhtmhtf ✏️‭ by θοδωρης Αναστασιαδης‭ on math.SE
 
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5 hours later…
20:04
C, duplicate of many Vandermonde identity questions, like this.
 
3 hours later…
22:47
This can probably be deleted: math.stackexchange.com/a/4896754 .

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