Doubling (AABBCC)
Make it instantly recognisable
9100 8800 50
?4,375
?3,500
9550033755
?18,625
?14,900
9117755333
?18,625
?14,900
9117700369
?14,376
?11,501
8877884005
?14,376
?11,501
7557755784
?14,376
?11,501
8877999191
?10,001
?8,001
8877117741
?10,001
?8,001
8877003306
?10,001
?8,001
8228822897
?10,001
?8,001
9117711719
?8,125
?6,500
8877881163
?8,125
?6,500
8877442218
?8,125
?6,500
8877114463
?8,125
?6,500
8877113360
?8,125
?6,500
8228877108
?8,125
?6,500
7557799369
?8,125
?6,500
9771133567
?6,250
?5,000
8877550058
?6,250
?5,000
8877113435
?6,250
?5,000
9576655331
?41,875
?33,500
9576331133
?41,875
?33,500
9155533665
?41,875
?33,500
9055511556
?41,875
?33,500
Doubling (AABBCC) number pattern