There are 10 sequential sets which are :

01,12,23,34,45,56,67,78,89,90

01 out 9 days, 12 out 12 days, 23 out 10 days, 34 out 5 days, 45 out 14 days, 56 out 11 days, 57 out 4 days,78 out 34 days, 89 out 6 days, 90 out 17 days. 

Last night(4/30) number was836. Playing620 and 621 tonight. Liking the 6 to repeat in the 1st position. Since 6 likes 2, I'm playing the 21 consecutive pair.

These sets come out frequently. Combing this with this chart: