63344

Appears in sequences

• Numbers k such that sopfr(k) = sopf(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k).at n=33A064675
• a(1)=1; a(n+1) is the smallest integer such that 1/a(n+1) = 0.0...00a(n)xxxxx...at n=9A069750
• [ (2n-1)!!/(4n) ].at n=7A104256