 We find then that formula_11, with the pairwise sums being 2, 3, 4, 5, 6 and 8.The sequence thus begins 

If we define formula_12, the resulting sequence is the same except each term is one less (that is, 0, 1, 3, 7, 12, 20, 30, 44, 65, 80, 96, ... ).The sequence was invented by Abdul Majid Mian and Sarvadaman Chowla.