Number of (w,x,y) with all terms in {0,...,n} and the numbers w,x,y,|w-x|,|x-y| distinct.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =12a(6) =38a(7) =92a(8) =160a(9) =286a(10) =422a(11) =632a(12) =870a(13) =1194a(14) =1542a(15) =2010a(16) =2502a(17) =3126a(18) =3788a(19) =4598a(20) =5446a(21) =6472a(22) =7532a(23) =8786a(24) =10092a(25) =11604a(26) =13164a(27) =14964a(28) =16812a(29) =18912