1139465

Appears in sequences

• Number of isoscent sequences of length n with exactly six descents.at n=3A243479
• a(n) = minimal value of n+k+1 such that the concatenation of the binary expansions of n,n+1,...,n+k is divisible by n+k+1, or -1 if no such n+k+1 exists.at n=51A332586