15
14
92 - 18 = 72 72 - 16 = 56 56 - 14 = 42 42 - 12 = 30 30 - 10 = 20 20 is the next number in the sequence.
119. un = (-n4 + 15n3 - 77n2 + 225n + 192)/6
14
10
5
14
Think it's 30...then 20
14 20.02.18.04.16.06.14.08.12.10.10.12.08.14.06.16.04.18.02.20
92 - 18 = 72 72 - 16 = 56 56 - 14 = 42 42 - 12 = 30 30 - 10 = 20 20 is the next number in the sequence.
119. un = (-n4 + 15n3 - 77n2 + 225n + 192)/6
14
10
20
14
18
14