The following numbers form the concentric hexagonal sequence :
0, 1, 6, 13, 24, 37, 54, 73, 96, 121, 150 ……
The number sequence forms a pattern with concentric hexagons, and the numbers denote the number of points required after the n-th stage of the pattern.
Input : N = 3
Output : 13
Input : N = 4
Output : 24
The above series can be referred from Concentric Hexagonal Numbers.
Nth term of the series is 3*n2/2
Below is the implementation of the above approach :
- Hexagonal Number
- Centered hexagonal number
- Program to calculate the area between two Concentric Circles
- Surface Area and Volume of Hexagonal Prism
- Check if a given circle lies completely inside the ring formed by two concentric circles
- Numbers less than N which are product of exactly two distinct prime numbers
- Print N lines of 4 numbers such that every pair among 4 numbers has a GCD K
- Maximum sum of distinct numbers such that LCM of these numbers is N
- Count numbers which can be constructed using two numbers
- Count numbers which are divisible by all the numbers from 2 to 10
- Absolute difference between the Product of Non-Prime numbers and Prime numbers of an Array
- Absolute Difference between the Sum of Non-Prime numbers and Prime numbers of an Array
- Print numbers such that no two consecutive numbers are co-prime and every three consecutive numbers are co-prime
- Sum of first n even numbers
- Add two numbers using ++ and/or --
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