Table 2.3
Number of Constitutionally Isomeric Alkanes
¥CH4 1 C8H18 18
¥C2H6 1 C9H20 35
¥C3H8 1 C10H22 75
¥C4H10 2 C15H32 4,347
¥C5H12 3 C20H42 366,319
¥C6H14 5 C40H82 62,491,178,805,831
¥C7H16 9