1729665

Appears in sequences

• Odd numbers taking exactly 21 steps to reach 15 in A086793.at n=5A119398
• Integers n such that if you insert between each of their digits either "*" (times), "^" (exponentiation), or "nothing" (so that two or more digits are merged to form an integer), then you can recover n in a nontrivial way (however, two "^" mustn't be adjacent - you must avoid decompositions containing a^b^c).at n=8A156322