Write a function that takes a positive integer num and calculates how many dots exist in a pentagonal shape around the center dot on the Nth iteration. In the image below you can see the first iteration is only a single dot. On the second, there are 6 dots. On the third, there are 16 dots, and on the fourth there are 31 dots. Return the number of dots that exist in the whole pentagon on the Nth iteration. Examples pentagonal (1) → 1 pentagonal (2) - 6 pentagonal (3) - 16 pentagonal (8) - 141
Write a function that takes a positive integer num and calculates how many dots exist in a pentagonal shape around the center dot on the Nth iteration. In the image below you can see the first iteration is only a single dot. On the second, there are 6 dots. On the third, there are 16 dots, and on the fourth there are 31 dots. Return the number of dots that exist in the whole pentagon on the Nth iteration. Examples pentagonal (1) → 1 pentagonal (2) - 6 pentagonal (3) - 16 pentagonal (8) - 141
Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Transcribed Image Text:Write a function that takes a positive integer num and calculates how many dots exist in a
pentagonal shape around the center dot on the Nth iteration.
In the image below you can see the first iteration is only a single dot. On the second, there
are 6 dots. On the third, there are 16 dots, and on the fourth there are 31 dots.
Return the number of dots that exist in the whole pentagon on the Nth iteration.
Examples
pentagonal (1) → 1
pentagonal (2) <-6
pentagonal (3) - 16
pentagonal (8) → 141
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