login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A055434 Number of points in Z^n of norm <= 10. 2

%I

%S 1,21,317,4169,49689,532509,5260181,48218513,415055025,3375505573,

%T 26107328109,193280122713,1374386800585,9405092131245,62077194367429,

%U 396122100447649,2449318034512737,14705097001902901,85877415063465373

%N Number of points in Z^n of norm <= 10.

%H Andrew Howroyd, <a href="/A055434/b055434.txt">Table of n, a(n) for n = 0..1000</a>

%t a[n_] := SeriesCoefficient[1/(1-x) Sum[x^(i^2), {i, -10, 10}]^n, {x, 0, 100}];

%t a /@ Range[0, 18] (* _Jean-Fran├žois Alcover_, Sep 29 2019, from A302997 *)

%Y Row n=10 of A302997.

%K nonn

%O 0,2

%A _David W. Wilson_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 24 23:25 EDT 2021. Contains 346273 sequences. (Running on oeis4.)