Extra Perfect Numbers (Special Numbers Series #7)

7 kyu
Extra Perfect Numbers (Special Numbers Series #7)


Task
Given a positive integer N , Return the extra perfect numbers in range from 1 to N .

Warm-up (Highly recommended)
Playing With Numbers Series
Notes
Number passed is always Positive .

Returned array/list should contain the extra perfect numbers in ascending order from lowest to highest

Input >> Output Examples
extraPerfect(3)  ==>  return {1,3}
Explanation:
(1)10 =(1)2
First and last bits as set bits.

(3)10 = (11)2
First and last bits as set bits.

extraPerfect(7)  ==>  return {1,3,5,7}
Explanation:
(5)10 = (101)2
First and last bits as set bits.

(7)10 = (111)2
First and last bits as set bits.

const extraPerfect = (n) => {
    let arr=[1];
    for (let i=3;i<=n;i+=2)
    arr.push(i)
    return arr 
  }