This is wildly too confusing of a question. It LOOKS like you are trying to find subsequences of any given array that increment by exactly 1.
That simple requires you to find blocks of ones when you form the diff of an array. Thus...
A=[15,14,16,10,6,1,2,8,9,10];
dA = diff(A) == 1
dA =
0 0 0 0 0 1 0 1 1
So there is a subsequence of length 2 and another of length 3 in string A.
start_A = strfind([0,dA,0],[0 1])
start_A =
6 8
end_A = strfind([0,da,0],[1 0])
end_A =
7 10
