Doubling (AABBCC)
Make it instantly recognisable
9966220657
?3,374
?2,699
7799009862
?3,374
?2,699
7799116756
?3,374
?2,699
7799225487
?3,374
?2,699
9966005302
?3,374
?2,699
7799008570
?3,125
?2,500
9966116513
?3,125
?2,500
9966002805
?3,125
?2,500
7799110453
?3,125
?2,500
7799009386
?3,125
?2,500
7799550264
?3,125
?2,500
9966779264
?3,125
?2,500
7799665039
?3,125
?2,500
9966119281
?3,125
?2,500
7799005498
?3,125
?2,500
9966440598
?3,125
?2,500
9966110462
?3,125
?2,500
7799004164
?3,125
?2,500
8297 552222
?15,625
?12,500
7977 550033
?18,625
?14,900
9137 006600
?10,001
?8,001
9321 448822
?8,125
?6,500
9321 771166
?8,125
?6,500
9321 775522
?8,125
?6,500
Doubling (AABBCC) number pattern