Pattern:
R1: 3hdc into the magic ring
R2: ch2 turn, 2hdc inc, hdc, 2hdc inc
R3: ch2 turn, 2hdc inc, 3hdc, 2hdc inc
R4: ch2 turn, 2hdc inc, 5hdc, 2hdc inc
R5: ch2 turn, 2hdc inc, 7hdc, 2hdc inc
R6: ch2 turn, 2hdc inc, 9hdc, 2hdc inc
R7: ch2 turn, 2hdc inc, 11hdc, 2hdc inc
R8-18: Ch2, turn, 15dhc
R19: ch2 turn, 6hdc, 2hdc dec, 7hdc
R20-29: ch2 turn, 14hdc (10 rows)
R30: ch2 turn, 6hdc, 2hdc dec, 6hdc
R31-40: ch2 turn, 13hdc (10 rows)
R41: ch2 turn, 5hdc, 2hdc dec, 6hdc
R42-51: ch2 turn, 12hdc (10 rows)
R52: ch2 turn, 5hdc, 2hdc dec, 5hdc
R53-62: ch2 turn, 11hdc. (10 rows)
R63: ch2 turn, 4hdc, 2hdc dec, 5hdc
R64-73: ch2 turn, 10hdc (10 rows)
(It should be about 18” by now)