59978domain: NAppears in sequencesa(n) = binary code (shown here in decimal) of the position of natural number n in the beanstalk-tree A218776.at n=39A218615a(0) = 0, and for n > 0, (a(n)) gives the indices n for which d(n) > d(k) for k < n, where d is the difference sequence of (cos k + sin k).at n=14A299639