5591040

Appears in sequences

• Number of Barlow packings with group R3(bar)m(O) that repeat after 6n layers.at n=22A011955
• Denominator of Bernoulli(2n,1/2).at n=6A033469
• a(n) = Sum_{k=floor((n+1)/2)..n} J(k+1), J(k) = A001045(k).at n=22A129362
• Denominator of Bernoulli(n, 1/2).at n=12A157780
• Denominator of Bernoulli(n, -1/2).at n=12A157782
• Coefficient of x in the reduction by x^2 -> x+2 of the polynomial p(n,x) defined below in Comments.at n=12A192382
• a(n) = 2^(n-3)*binomial(n,4).at n=15A213432
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 43", based on the 5-celled von Neumann neighborhood.at n=22A278446
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 107", based on the 5-celled von Neumann neighborhood.at n=24A278901
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 342", based on the 5-celled von Neumann neighborhood.at n=23A287745
• Number of chiral pairs of color patterns (set partitions) for a row of length n using 4 or fewer colors (subsets).at n=13A320934
• a(n) = denominator(b_n(x)), where b_n(x) are the polynomials defined in A335947.at n=12A335949