2579.js

/** ------------------------------------------------------------------------------
 * 
 * 2579. Count Total Number of Colored Cells
 * Topics: Math
 * https://leetcode.com/problems/count-total-number-of-colored-cells/description/
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {number} n
 * @return {number}
 */
var coloredCells = function (n) {
  return (n - 1) * 2 * n + 1
}

console.log(coloredCells(1))
console.log(coloredCells(2))
console.log(coloredCells(3))
console.log(coloredCells(4))
console.log(coloredCells(5))
console.log(coloredCells(6))
console.log(coloredCells(7))