18015

Appears in sequences

• Number of 2's in n-th term of A022470.at n=38A022473
• Floor(X/Y) where X = concatenation of the (n+1)-st even number through the (2n)-th even number and Y = concatenation of first n even numbers.at n=20A067091
• Constant term when a polynomial of degree n is fitted to the lower members of the first n+1 twin prime pairs.at n=11A082674
• Inverse binomial transform of the Moebius sequence {mu(k), k >= 1}, A008683.at n=15A124839
• a(n) = Least i in range [A165598(n),A165598(n+1)] for which abs(A165597(i)) gets the maximum value in that range.at n=31A165599
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 507", based on the 5-celled von Neumann neighborhood.at n=27A272587
• Products of three distinct tribonacci numbers > 1.at n=39A274434
• Expansion of Product_{k>=0} (1-x^(4*k+3))^(4*k+3).at n=40A285213
• Expansion of Product_{k>=0} (1 + x^(4*k+3))^(4*k+3).at n=40A285339
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^3.at n=37A341241
• a(n) is the number of unlabeled planar modular lattices on n nodes.at n=15A368461
• Expansion of sqrt((1-3*x) / (1-7*x)^5).at n=4A387234