Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.
A218431
Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.
Terms
- a(0) =2304a(1) =36864a(2) =57600a(3) =186624a(4) =230400a(5) =451584a(6) =589824a(7) =630000a(8) =806400a(9) =921600a(10) =1440000a(11) =2073600a(12) =2822400a(13) =2985984a(14) =3686400a(15) =4665600a(16) =5531904a(17) =6969600a(18) =7225344a(19) =8960000a(20) =9437184a(21) =10080000a(22) =12672000a(23) =12902400a(24) =14745600a(25) =15116544a(26) =16257024a(27) =18662400a(28) =19079424
External references
- oeis: A218431