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What is the Pattern 4,25,130,655
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5 votes
What is the Pattern 4,25,130,655

User Oleg Yaroshevych
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7.2k points

2 Answers

3 votes
This pattern looks complicated so it could be anything. One possible pattern is

a(n) = ( 21·5ⁿ - 25 ) / 20

So pattern starts at n=1 and sequence would be 4, 25, 130, 655, 3280, ...
User Semihcan Doken
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7.7k points
2 votes
somewhere a round six

i think 6.25
User Kenneth Salomon
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7.7k points
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