offsets

[Alexandre Wajnberg]

Hello all and Neil and Éric,

Regarding the difficulties (encountered by some people including me) to 
complete correctly the "offset" line, and to clarify the explanations 
for the newcomers at OEIS,
I suggest to add more exemples in the help file.
http://www.research.att.com/~njas/sequences/eishelp1.html

The only two illustrations are Fibonacci:
%S A000045 0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,
and Characteristic function of primes: A010051 
0,0,1,1,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0

...both begining with 0, AND having first offset 0, which may be 
confusing (now I know!).

I suggest to add exemples of sequences having offsets like
1,1
1,2
1,3
or even 15,x (I saw one, recently, don't remember which one),
AND beginning with an a(first term) different than 1, in order to cover 
the most frequent cases.


Alexandre

PS for Éric: if you still need explanation for the first offset,
I 'll do it next friday at the Napoli!  ;-)


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Le mardi, 16 aoû 2005, à 15:25 Europe/Brussels, Eric Angelini a écrit :
> Merci beaucoup à tous et toutes !
>
> à+
> É.

----------------------------------------------
> Le vendredi, 12 aoû 2005, à 04:21 Europe/Brussels, N. J. A. Sloane a 
> écrit :
>> Dans la conversation il s'agissait du deuxieme numero du "offset".
>>
>> Le "offset" contient deux termes.
>> Le premier est normalement l'indice du premier terme dans la suite.
>> Le deuxieme est l'index du premier terme qui a un valeur (magnitude) 
>> superieur a 1.
>>
>> Pour le deuxieme, on commence a compter de 1 (et pas 0).
>>
>> Par exemple:
>>
>> 1,1,1,2,3,...
>>
>> Le deuxieme "offset" est 4.
>>
>> J'espere que l'explication est claire malgre les fautes de francais...
>>
>> NJAS
>>
>> (Merci a Nadia Heninger pour la traduction !)
>