520602096

Appears in sequences

• a(n) = floor((-1 + 4^n)/(-1 + 2*n)).at n=16A191636
• Numbers a(n) with property a(n) + a(n+5) = 2^(n+5) - 1 = A000225(n+5).at n=29A224521
• a(n) = floor(2^(n+1)/n).at n=32A281375