the differences in the entries upto n=47 are: n=29, 2520, 2310, LCM {9, 8, 7, 5} is 2520 n=40, 27720, 20020, LCM {11, 9, 8, 7, 5} is 27720 n=42, 32760, 30030, LCM {13, 9, 8, 7, 5} is 32760 so it looks like the PARI program in A206398 misses multiples of 9*8*7*5. Any PARIsians on this list? Wouter. -----Original Message----- From: Leo Broukhis Sent: Monday, April 27, 2015 3:06 AM To: greenwald@cis.upenn.edu Cc: math-fun Subject: Re: [math-fun] Dupes in OEIS? The definitions seem equivalent to me ("largest LCM of partitions of n" vs "Maximum least common multiple of some set of positive integers adding up to n"), therefore whenever A000793 and A206398 diverge, the largest value (in A000793) wins. I think that A206398 should be scrapped. Leo On Sun, Apr 26, 2015 at 5:27 PM, Michael Greenwald <mbgreen@seas.upenn.edu> wrote:
On 2015-04-26 16:44, Leo Broukhis wrote:
Is there supposed to be a difference between https://oeis.org/A206398 and https://oeis.org/A000793 ?
Are you asking about the definitions? Or the contents?
If the latter, then there's a 32760 in A000793 instead of a 30030 in the same position in A206398. If you believe the sequences *should* be identical, based on their definitions, then you may be able to figure out which one is mistaken at the positions they disagree in.
I think two sequences with identical elements are considered distinct unless you can prove that the two series should be identical.
(This came to my attention when I remembered a puzzle I invented as a kid: how many times a text might need to be typed on a typewriter with hammers re-soldered in a random order to get the desired result, given the number of the typewriter keys.)
Thanks, Leo
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