29826161

Appears in sequences

• Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,0.at n=12A037597
• a(n) = a(n-1) + 2^(A047258(n)) for n>1, a(1)=1.at n=12A113867
• First differences of A131666.at n=28A131090
• a(0)=1. a(n+1)=2*a(n)-A130151(n).at n=27A132780
• a(n) = 2*a(n-1) - a(n-3) + 2*a(n-4).at n=25A135350
• a(n) = floor(2^n/9).at n=28A153234
• Greatest odd number that requires n Collatz (3x+1) iterations to reach 1, or zero if there is no such number.at n=30A176868
• Greatest odd number k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n, or 0 if there is no such k.at n=26A222755
• Numbers of the form (2^(2*j + 6*k + 10) - 2^(2*j + 2) - 3)/9, with j,k >= 0.at n=21A342816
• a(n) = (2^(3*n + 3 + (-1)^n) - (6 + (-1)^n))/9, for n >= 1.at n=7A350053
• a(n) = (4^(3*n+2) - 7)/9.at n=3A350054