Allan, I had exactly the same idea, and this afternoon I created A330545! It is indeed the key to the whole problem - and of course the recurrence makes it a lot easier to compute. On Tue, Dec 17, 2019 at 5:27 PM Allan Wechsler <acwacw@gmail.com> wrote:
There is an underlying sequence, which tells what columns successive prime numbers land in. This is the alternating sum of the decremented first differences of the primes, with the sequence starting at 2. Just reading off Eric's picture, I get
2,2,3,2,5,4,7,6,9,4,5,0,3,2,5,0,....
A330339 is then the primes indexed by occurrences of zero in this alternating sum.
On Tue, Dec 17, 2019 at 5:14 PM Neil Sloane <njasloane@gmail.com> wrote:
On Tue, Dec 17, 2019 at 4:24 PM Éric Angelini <eric.angelini@skynet.be> wrote:
Thank you Walter! This is an incentive for ski slopes! Best, É.
Le 17 déc. 2019 à 20:05, Walter Trump <w@trump.de> a écrit :
The next Boustrophedon primes are 3821 and 3989. Here is a continuation of Eric's arrangement of numbers (you cannot read the digits, they are too small): https//www.trump.de/Boustrophedon-Primes.png
Walter
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun