2796202

Appears in sequences

• a(2n) = 2*a(2n-1), a(2n+1) = 2*a(2n)+1 (also a(n) is the n-th number without consecutive equal binary digits).at n=22A000975
• a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.at n=22A014113
• a(n) = (2/3)*(4^n-1).at n=11A020988
• a(n) = C(n,1) + C(n,4) + ... + C(n, 3*floor(n/3) + 1).at n=22A024494
• a(n) = a(n-1) + 2*a(n-2) + 2, for n>=3, where a(0)= 1, a(1)= 2, a(2)= 4.at n=21A026644
• Numbers that are repdigits in base 4.at n=32A048329
• a(n) = floor(8^8/n).at n=5A057070
• Numerator of the expected time to finish a random Tower of Hanoi problem with n disks using optimal moves.at n=22A060590
• Number of 132 and 213-avoiding derangements of {1,2,...,n}.at n=23A061547
• Half totient of 2^n+1.at n=22A063474
• Positions of negative coefficients in cyclotomic polynomial Phi_n(x), converted from binary to decimal. (The constant term in the least significant bit (bit-0), the term x in the next bit (bit-1) and so on).at n=46A063698
• Sequence A075166 interpreted as binary numbers and converted to decimal.at n=30A075165
• Expansion of (1 - x)/((1 + x)*(1 - 2*x)).at n=23A078008
• Expansion of (1-x)/(1+x+2*x^2+2*x^3).at n=43A078052
• Size of "uniform" Hamming covers of distance 1, that is, Hamming covers in which all vectors of equal weight are treated the same, included or excluded from the cover together.at n=22A081374
• Duplicate of A020988.at n=11A084180
• Partial sums of a Jacobsthal related sequence.at n=22A084184
• Smallest numbers having in binary representation exactly n maximal groups of consecutive zeros.at n=11A087120
• a(n) is the smallest number such that the exponent of p=2 factor in 6*a(n)+4 equals n.at n=23A087231
• Generalized multiplicative Jacobsthal sequence.at n=23A087464