1649373

Appears in sequences

• a(n) = (2^n - 1)/product(2^p - 1) where the product is over all distinct primes p that divide n.at n=29A055515
• Quotient of A000225 and A064084.at n=29A064085
• Condensed version of A064085: all terms of A064085 with values greater than 1 (which coincides with all terms of A064085 with nonprime power index).at n=12A064086
• Starts of runs of 4 consecutive Niven numbers in base 3/2 (A342426).at n=0A342429