141327

Appears in sequences

• Number of binary strings of length n with equal numbers of 0001 and 1001 substrings.at n=19A164162
• Let f(x) be the absolute value of the difference between x and its base-2 reversal. Let g(x) be the number of times f(x) must be applied to x for the result to be 0. a(n) is the smallest value of x for which g(x) is n.at n=15A259658