178956970

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=28A000975
• Barlow packings with group R3(bar)m(SO) that repeat after 6n+3 layers.at n=28A011954
• a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.at n=28A014113
• a(n) = (2/3)*(4^n-1).at n=14A020988
• a(n) = C(n,1) + C(n,4) + ... + C(n, 3*floor(n/3) + 1).at n=28A024494
• 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=27A026644
• Numerator of the expected time to finish a random Tower of Hanoi problem with n disks using optimal moves.at n=28A060590
• Number of 132 and 213-avoiding derangements of {1,2,...,n}.at n=29A061547
• Sequence A075166 interpreted as binary numbers and converted to decimal.at n=42A075165
• List of codewords in binary lexicode with Hamming distance 14 written as decimal numbers.at n=17A075958
• Expansion of (1 - x)/((1 + x)*(1 - 2*x)).at n=29A078008
• 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=28A081374
• Partial sums of a Jacobsthal related sequence.at n=28A084184
• Smallest numbers having in binary representation exactly n maximal groups of consecutive zeros.at n=14A087120
• a(n) is the smallest number such that the exponent of p=2 factor in 6*a(n)+4 equals n.at n=29A087231
• Generalized multiplicative Jacobsthal sequence.at n=29A087464
• Generalized Jacobsthal sequence.at n=28A087628
• Pair reversal of a Jacobsthal sequence.at n=28A094359
• Moebius transform of Jacobsthal numbers.at n=29A104723
• Expansion of x^3 / ((x-1)*(2*x-1)*(x^2-x+1)).at n=29A111927