A124080 10 times triangular numbers

[Jonathan Post]

I wondered too.  It intersects the much more interesting
 A000537 <http://www.research.att.com/%7Enjas/sequences/A000537>
 Sum of first n cubes; or n-th triangular number squared.  at 100.

Not that all of my roughly 1 kilophi sequences and comments are interesting,
either.

-- Jonathan

On 11/26/06, zak seidov <zakseidov at yahoo.com> wrote:
>
> Neil, Zerinvary, seqfans,
> Why this sequence?!
> Thanks, Zak
>
> %I A124080
> %S A124080
> 0,10,30,60,100,150,210,280,360,450,550,660,780,910,1050,1200,1360,1530,
> %T A124080
> 1710,1900,2100,2310,2530,2760,3000,3250,3510,3780,4060,4350,4650,4960,
> %U A124080
> 5280,5610,5950,6300,6660,7030,7410,7800,8200,8610,9030,9460,9900,10350
> %N A124080 10 times triangular numbers.
> %F A124080 a(n)=10*C(n,2), n>=1
> %p A124080 [seq(10*binomial(n,2) ,n=1..51)];
> %Y A124080 Cf. A028895, A046092, A045943, A002378,
> A028896, A024966, A033996, A027468.
> %K A124080 easy,nonn,new
> %O A124080 0,2
> %A A124080 Zerinvary Lajos
> (zerinvarylajos(AT)yahoo.com), Nov 24 2006
>
>
>
>
>
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