Answer:
3
Step-by-step explanation:
1,(3),7,9,21,43,63,129,301,387,903,2709
1,2,(3),4,5,6,10,12,15,20,29,30,58,60,87,116,145,174,290,348,435,580,870,1740
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Answers & Comments
Answer:
3
Step-by-step explanation:
1,(3),7,9,21,43,63,129,301,387,903,2709
1,2,(3),4,5,6,10,12,15,20,29,30,58,60,87,116,145,174,290,348,435,580,870,1740