[seqfan] Re: Fractions, digits, decimal expansion
Lars Blomberg
larsl.blomberg at comhem.se
Fri Dec 18 18:15:05 CET 2015
Hello,
For A265740 I get
n a(n) F(n)
1 1 2
34 2 4
544 4 5
1241 5 50
2539 50 165
2738 165 450
4702 450 1650
10042 1650 1980
19499 1980 2475
35324 2475 24750
50422 24750 24975
59425 24975 59400
59447 59400 59448
59448 59448 59449
59449 59449 59450
...
Continues with stretches of sequential numbers interrupted by smaller or larger jumps.
(Unfortunately there was a mistake in my original data. I have submitted
a correction which has not yet been approved. That is why my values differ slightly.)
For A265756 I get
n a(n) F(n)
1 1 2
33 2 4
540 4 5
1236 5 40
4154 40 250
6252 250 1250
6489 1250 1650
10042 1650 1980
19499 1980 2475
35324 2475 24750
50422 24750 24975
59425 24975 59400
59447 59400 59448
59448 59448 59449
59449 59449 59450
...
and a similar continuation as above.
Comparing the two sequences up to nMax there are D(nMax) differences.
Showing also the last difference between the two sequences.
nMax D(nMax) D(n)/n n A265740 A265756
10^4 7897 0.79 9987 9999 9990
10^5 10644 0.11 99998 99999 99990
10^6 13187 0.013 999998 999999 999990
so the differences certainly become more sparse.
I will try for 10^7 but that is probably still too small.
/Lars B
-----Ursprungligt meddelande-----
Från: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] För Bob Selcoe
Skickat: den 16 december 2015 14:46
Till: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Ämne: [seqfan] Re: Fractions, digits, decimal expansion
Hi Hans, Lars and Seqfans,
Thanks Lars and Hans for posting A265740 and A265756.
Might the two sequences eventually converge? If so, I imagine n would be large.
It would be interesting to see where the smallest missing term appears in both sequences. For example A265740; using Lars' terminology, F(n)= smallest missing term up to n:
n a(n) F(n)
1 1 2
34 2 4
539 4 5
1239 5 50
2531 50 165
2731 165 ...
Would n and F(n) for both sequences be worth contributing?
Cheers,
Bob S.
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