var GET=(function(){function f(s){return new g(s);}function g(s){this._s=s.trim().split("\n");this._y=0;}g.prototype.a=function(f){var s=this._s, y=this._y, r;if(typeof s[y]==="string")s[y]=s[y].split(" ").reverse();r=s[y].pop();if(!s[y].length)this._y++;return f?r:+r;};g.prototype.l=function(f){var s=this._s[this._y++].split(" ");return f?s:s.map(a=>+a);};g.prototype.m=function(n,f){var r=this._s.slice(this._y,this._y+=n).map(a=>a.split(" "));return f?r:r.map(a=>a.map(a=>+a));};g.prototype.r=function(n,f){var r=this._s.slice(this._y,this._y+=n);return f?r:r.map(a=>+a);};return f;})();
var o=GET(require("fs").readFileSync("/dev/stdin","utf8"));
var mod = 1e9+7;

console.log(main());
function main(){
  var n = o.a();
  var dp = Array(n+1).fill(0).map(a=>Array(4).fill(0).map(a=>Array(4).fill(0).map(a=>Array(4).fill(0))));
  for(var i = 1; i < 4; i++){
    for(var j = 0; j < 4; j++){
      for(var k = 0; k < 4; k++){
        for(var l = 0; l < 4; l++){
          if(j === 0 && k === 1 & l === 2)continue;
          if(j === 0 && k === 2 & l === 1)continue;
          if(j === 1 && k === 0 & l === 2)continue;
          dp[i][j][k][l] = 1;
        }
      }
    }
  }
  for(var i = 4; i <= n; i++){
    for(var j = 0; j < 4; j++){
      for(var k = 0; k < 4; k++){
        for(var l = 0; l < 4; l++){
          for(var m = 0; m < 4; m++){
            if(k === 0 && l === 1 & m === 2)continue;
            if(k === 0 && l === 2 & m === 1)continue;
            if(k === 1 && l === 0 & m === 2)continue;
            if(j === 0 && l === 1 & m === 2)continue;
            if(j === 0 && k === 1 & m === 2)continue;
            dp[i][k][l][m] += dp[i-1][j][k][l];
            dp[i][k][l][m] %= mod;
          }
        }
      }
    }
  }
  var ans = 0;
  for(i = 0; i < 4; i++)for(j = 0; j < 4; j++)for(k = 0; k < 4; k++){
    ans += dp[n][i][j][k];
  }
  return ans % mod;
}