The OEIS is looking to hire part-time people to help edit core sequences, upload scanned documents, process citations, fix broken links, etc. - Neil Sloane, njasloane@gmail.com
0,2
Table of n, a(n) for n=0..81.
t0:=Array(0..10000, 0); M:=15;
for i from -M to M do for j from -M to M do for k from -M to M do
t1:=i^2+j^2+4*k^2; t0[t1]:=t0[t1]+1; od: od: od:
[seq(t0[i], i=0..100)];
x^2+y^2+k*z^2: A005875, A014455, A034933, A169784.
Sequence in context: A228048 A016705 A245592 * A133657 A121455 A227033
Adjacent sequences: A169780 A169781 A169782 * A169784 A169785 A169786
nonn
N. J. A. Sloane, May 12 2010
approved