2095104

Appears in sequences

• Generalized Euler phi function (for p=2).at n=21A003473
• Number of reversible strings with n beads of 4 colors. If more than 1 bead, not palindromic.at n=10A032087
• Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reversed complement, but are not equivalent to their reverse and complement.at n=22A045687
• a(n) = 2^(n+2)*(2^(n+1)-1).at n=9A059153
• Numbers n such that sigma(n) - usigma(n) = 3n/2.at n=2A063870
• Expansion of (4 - 7*x + 2*x^2)/((1-2*x)*(1 - 2*x + 2*x^2)).at n=20A100215
• a(n) = Sum_{k=0..n} 2^max(k, n-k).at n=19A107659
• Number of rationals in [0, 1) having exactly n preperiodic bits, then exactly n periodic bits.at n=10A119920
• a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) for n >= 4 starting with a(0) = 1, a(1) = 2, a(2) = 4, and a(3) = 6.at n=22A131885
• a(n) is the number of induced subgraphs with odd number of edges in the cycle graph C(n).at n=20A156232
• G.f.: (32*x^7/(1-2*x) + 16*x^5 + 24*x^6)/(1-2*x^2).at n=22A204696
• Number of bitstrings of length n (with at least two runs) where the last two runs have different lengths.at n=20A208901
• Numbers k such that k^2 XOR (k+1)^2 is a square, and k^2 XOR (k-1)^2 is a square, where XOR is the bitwise logical XOR operator.at n=14A224242
• a(n) = 3^n*A_{n, 1/3}(-1) where A_{n, k}(x) are the generalized Eulerian polynomials.at n=10A225116
• The number of length n binary words with some prefix which contains two more 1's than 0's or two more 0's than 1's.at n=21A233411
• Number of similarity classes of vectors with minimal Ducci period n.at n=21A269795
• 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 54", based on the 5-celled von Neumann neighborhood.at n=21A285611
• 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 182", based on the 5-celled von Neumann neighborhood.at n=22A286410
• 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 493", based on the 5-celled von Neumann neighborhood.at n=20A288664
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 785", based on the 5-celled von Neumann neighborhood.at n=20A290414