1835006

Appears in sequences

• a(n) = Sum_{k=0..n} A026615(n, k).at n=20A026622
• a(0)=1, a(1)=2, a(2)=1; for n>2, a(n) = 7*2^(n-3)-2.at n=21A174317
• a(n) = 7*2^n - 2.at n=18A176448
• a(n) is the smallest even number not congruent to 1 modulo 3 that starts a (2n+1)-element alternating sequence of x/2 and (3x+1) iterations ending in the maximum of its Collatz trajectory.at n=17A277215
• a(n) - 2*a(n-1) = period 2: repeat [3, 0] for n > 0, a(0)=5, a(1)=13.at n=18A322417