Number of (w,x,y,z) with all terms in {1,...,n} and w^2>x^2+y^2+z^2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =5a(4) =22a(5) =60a(6) =135a(7) =256a(8) =452a(9) =736a(10) =1146a(11) =1701a(12) =2436a(13) =3388a(14) =4602a(15) =6101a(16) =7949a(17) =10175a(18) =12849a(19) =16009a(20) =19728a(21) =24060a(22) =29058a(23) =34798a(24) =41363a(25) =48793a(26) =57202a(27) =66640a(28) =77231a(29) =88992