43155

Appears in sequences

• Expansion of e.g.f. arcsinh(log(x+1) - tanh(x)).at n=10A013288
• Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of Pi.at n=28A049520
• T(n,n-5), where T is the array in A055830.at n=26A055832
• Odd numbers k such that abs(sigma(k)-2k) <= sqrt(k). Abundance-radius = abs(sigma(k)-2k) does not exceed square root of k and k is odd.at n=23A087415
• Number of (n+1)X6 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.at n=0A205733
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.at n=10A205736
• Number of 2 X (n+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.at n=4A205737
• Number of (n+1)X6 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same.at n=0A205906
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same.at n=10A205909
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same.at n=14A205909
• Number of (n+1) X 6 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.at n=0A205914
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.at n=10A205917
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.at n=14A205917
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 105", based on the 5-celled von Neumann neighborhood.at n=40A270162
• Expansion of Product_{k>=2} 1/(1 - x^k)^bigomega(k), where bigomega(k) is the number of prime divisors of k counted with multiplicity (A001222).at n=39A293549
• Number of chordless cycles (of length >=4) in the complement of the n-odd graph.at n=4A364993