229362

Appears in sequences

• a(n) = n*(2^n - 1).at n=14A066524
• Direct matrix (non-recursive) content of -n to n+1 symmetry matrices.at n=27A105110
• a(1)=2. For n >=2, a(n) = the least integer >= a(n-1) that is not coprime to both a(n-1)+1 and a(n-1).at n=41A140525
• a(n) = sigma(n*2^n).at n=12A176311
• Numbers k that divide the 3k-th Clausen number.at n=12A212197