[seqfan] Re: A summer seq with second differences

[Eric Angelini]

Many thanks, Paolo!
And such sequences can be computed
ad libitum for 3rd, 4th, 5th, ... nth differences, of course.

BTW could you add this comment
to A164073 (as I have no access to it):
"Absolute second differences are the
sequence itself"
(this might be suggested by the other
comments but is not obvious to me).

Best,
É.

Propulsé d'un aPhone



Le 30 juil. 2013 à 09:13, "Paolo Lava" <paoloplava at gmail.com> a écrit :

> It should start as:
> 
> 1, 2, 4, 8,16, 32, 49, 72, 98, 126, 158, 199, 247, 297, 356, 423, 491, 561,
> 637, 714, 796, 886, 977, 1077, 1186, 1297, 1412, 1534, 1658, 1791, 1931,
> 2074, 2222, 2376, 2534, 2694, 2857, 3024, 3200, 3377, 3559, 3747, 3936...
> 
> 
> 2013/7/29 Eric Angelini <Eric.Angelini at kntv.be>
> 
>> 
>> Hello SeqFans,
>> 
>> S=1,2,4,8,16,32,49,72,98,126,158,199,247,297,352,423,...
>> Compute the second differences and... look who's coming back!
>> 
>> Best,
>> É.
>> 
>> 
>> 
>> 
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>> 
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>> 
> 
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