Accurate number of trainers in Pokémon Red/Blue

(counting regular trainers & Giovanni; but neither Gym Leaders, nor Rivals/Champ)

Victory Road 	: 11 (2+5+4)	✓
Viridian Forest :  3			✓
Viridian Gym	:  9			✓
Celadon Corner	: 13 (1+5+1+2+4)✓
Celadon Gym		:  7			✓
Cerulean City 	:  1			✓
Cerulean Gym	:  2			✓
Cinnabar Gym	:  7			✓
Dojo			:  5			✓
Fushcia Gym		:  6			✓
Mansion			:  6 (1+1+2+2)	✓
Mt Moon			: 12 (7+5)		✓
Pewter Gym		:  1			✓
Pokémon Tower	: 16 (3+3+4+3+3)✓
Rock Tunnel		: 15 (7+8)		✓
Route 3			:  8			✓
Route 4			:  1			✓
Route 6			:  6			✓
Route 8			:  9			✓
Route 9			:  9			✓
Route 10		:  6			✓
Route 11		: 10			✓
Route 12-15		: 37(7+10+10+10)✓
Route 16-17		: 16 (6+10)		✓
Route 18		:  3			✓
Route 19-20		: 20 (10+10)	✓
Route 21		:  9			✓
Route 24		:  7			✓
Route 25		:  9			✓
Saffron Gym		:  7			✓
Silph Co.		: 31 (4+2+3+4+3+4+3+3+2+3)
								✓
SS Anne			: 16 (2+4+4+6)	✓
Vermillion Gym	:  3			✓

TOTAL			:321

#########################################################

OPP_ = #trainers + #leaders + #E4 + Rival1/4 - Giovanni
	 = #trainers + 8 + 4 + 2 - 1
#trainers = OPP_ - 13
		  = 334 - 13 = 321