a(n) = number of ordered triples (w,x,y) such that w,x,y are all in {0,...,n} and the numbers |w-x|, |x-y|, |y-w| are distinct.
A212963
a(n) = number of ordered triples (w,x,y) such that w,x,y are all in {0,...,n} and the numbers |w-x|, |x-y|, |y-w| are distinct.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =12a(4) =36a(5) =84a(6) =156a(7) =264a(8) =408a(9) =600a(10) =840a(11) =1140a(12) =1500a(13) =1932a(14) =2436a(15) =3024a(16) =3696a(17) =4464a(18) =5328a(19) =6300a(20) =7380a(21) =8580a(22) =9900a(23) =11352a(24) =12936a(25) =14664a(26) =16536a(27) =18564a(28) =20748a(29) =23100
External references
- oeis: A212963