42330

Appears in sequences

• List of codewords in binary lexicode with Hamming distance 8 written as decimal numbers.at n=20A075940
• Numbers k such that 2*10^k + 4*R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=15A102953
• G.f.: A(x) = exp( 2*Sum_{n>=1} A006519(n)^2 * x^n/n ), where A006519(n) = highest power of 2 dividing n.at n=20A162581
• Rows of binary Walsh matrices interpreted as reverse binary numbers.at n=28A228539
• Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments.at n=14A265054
• Expansion of Product_{k>=1} 1 / (1 - 2*x^k)^3.at n=8A266945
• Number of locally stable rooted trees with n nodes, meaning no branch is a submultiset of any other (unequal) branch of the same root.at n=17A316475
• a(n) = Sum_{k=0..n} floor(sqrt(k))^5.at n=34A363499