Iron Brigade and was previously called the "Black Hat" Brigade. The 3rd Brigade Combat Team, 1st Infantry Division was known as the Iron Brigade from its formation in 1917 through World War I, World War II and Vietnam, until some time in the early 2000s when, for reasons that are still unclear, the name was changed to Duke Brigade. The unit crest was an Iron Cross in a triangle, it appears that that was also changed. The 3rd Brigade of the 4th Infantry Division is also known as the Iron Brigade. Its unit crest is similar to the medals issued to veterans
Lozanić's triangle numbers "l"(8, "n") (), then alkane numbers "l"(9, "n") (), then "l"(10, "n") (), "l"(11, "n") (), "l"(12, "n") (), etc. The sum of the "n"th row of Lozanić's triangle is formula_1 ( lists the first thirty values or so). The sums of the diagonals of Lozanić's triangle intermix formula_2 with formula_3 (where "F" is the "x"th Fibonacci number). As expected, laying Pascal's triangle over Lozanić's triangle and subtracting yields a triangle with the outer diagonals consisting of zeroes (, or for a version without the zeroes). This particular difference triangle has applications in the chemical study of catacondensed polygonal