345972

Appears in sequences

• a(n) = number of strings of length n that can be obtained by starting with abc and repeatedly doubling any substring in place.at n=15A135473
• a(n) is the decimal representation of the binary number with string structure 10s00, s in {0,1}*, such that it results in a non-palindromic cycle of length 4 in the Reverse and Add! procedure in base 2 and is not in the trajectory of any m < a(n).at n=17A306516