[1,3,6,10,2,5,9,14,15,21,28,36,45,4,8,13,19,20,27, 35,44,54,55,66,78,7,12,18,25,26,34,43,53,64,65,77, 11,17,24,32,33,42,52,63,75,76,16,23,31,40,41,51, 62,74,22,30,39,49,50,61,73,29,38,48,59,60,72]