aboveMainDiagAlphaPrep

let rows = parseInt(gets());

let matrix = [];

for (let i = 0; i < rows; i++) {
    let row = [];
    for (let j = 0; j < rows; j++) {
        if (j === 0) {
            row.push(2 ** i);
        } else {
            row.push(row[j - 1] * 2);
        }
    }
    matrix.push(row);
}

let sumAboveDiagonal = BigInt(0);

for (let i = 0; i < rows; i++) {
    for (let j = i + 1; j < rows; j++) {
        let currentNumber = BigInt(matrix[i][j]);
        sumAboveDiagonal += currentNumber;
    }
}

console.log(sumAboveDiagonal.toString());