[ [ 1, 2, 4, 7, 13 ], [ 2, 2, 3, 4, 6, 7, 8, 8, 10, 10, 12, 13, 14, 14, 15, 15, 18, 19, 19, 21, 22, 23, 
      23, 26, 26, 27, 27, 28, 28, 29, 32, 33, 33, 34, 35, 35, 37, 38, 39, 42, 42, 42, 43, 44, 45 ] ]