-2329600

Appears in sequences

• a(n) = C(n+11, 11)*(n+6)*(-1)^(n+1)*512/3.at n=4A138334
• a(0) = 0, a(1) = 1, for n > 1, a(n) = 2^(n+1) - 3*(sigma((2^n)-1) - sigma((2^(n-1))-1)).at n=20A329892