43688

Appears in sequences

• Numbers such that harmonic mean of digits is 5.at n=26A062183
• Triangle read by rows: T(n,k) = (n+1,k)-th element of (M^4-M)/3, where M is the infinite lower Pascal's triangle matrix, 1<=k<=n.at n=29A096035
• Triangle T(n,k) read by rows: see formula lines for definition.at n=21A097474
• Left-hand edge of triangle in A097474.at n=6A097716
• a(n) = abs(A154879(n+1)).at n=16A115341
• 1/512 the number of permutations of 0..n with exactly 6 maxima.at n=11A130662
• a(n) = (2^n + 2*(-1)^n - 6)/3.at n=17A153772
• Third differences of the Jacobsthal sequence A001045.at n=17A154879
• a(n) = 2*(1+(-1)^n)/3 + 2*A010892(n-1).at n=17A191370
• Number of binary words of length n containing no subword 10001.at n=16A210003
• Triangle read by rows: T(n,k) = number of squares and rectangles of area 2^(k-1) after 2^n stages in the toothpick structure of A139250, n>=1, k>=1, assuming the toothpicks have length 2.at n=36A211016
• T(n,k) = total area of all squares and rectangles of area 2^(k-1) after 2^n stages in the toothpick structure of A139250, n>=1, k>=1, assuming the toothpicks have length 2. Triangle read by rows.at n=36A211017
• Total number of parts of multiplicity 7 in all partitions of n.at n=48A222707
• Numerator of c(n) = 2^(2*n)*(2^(2*n) - 1)/(2*n)!, a coefficient used in the expansion of tan(x) as Sum_{n>=1} c(n)*|Bernoulli(2*n)|*x^(2*n-1).at n=7A225845
• Decimal representation of the n-th iteration of the "Rule 133" elementary cellular automaton starting with a single ON (black) cell.at n=9A267457
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 809", based on the 5-celled von Neumann neighborhood.at n=21A284177