The pattern is: divide by 4.5, then subtract 2. 945÷4.5=210, 210-2=208; 210÷4.5≈46.67, 46.67-2≈44.67... Wait, let me recalculate. Actually: 945÷4.5=210, 210-2=208 (but we have 52.5). Let me verify: 945÷18=52.5, 52.5-37.5=15. Actually the pattern stated in sub_topic is 'dividing by 4.5 and then subtracting 2'. Let me check: 945÷4.5=210, but next term is 210. So it's just dividing by 4.5. Then 210÷4.5=46.67, but we have 52.5. 210÷4=52.5. 52.5÷3.5=15. 15÷3=5. The divisors are 4.5, 4, 3.5, 3...