The first and last digits are the same and increasing by 1. Middle digits in the series, i.e. 2, 3, 5, 8, 12........ follow the following pattern: 2 + 1 = 3, 3 + 2 = 5, 5 + 3 = 8, 8 + 4 = 12, 12 + 5 = 17 and so on. Therefore, the required next term in the series is 6176.