27335

Appears in sequences

• Numbers k such that k + sum of its prime factors = (k+1) + sum of its prime factors.at n=31A020700
• One eighty-fourth the area of primitive Pythagorean triangles with (increasing) square hypotenuses (precisely those of A008846).at n=8A072289
• Triangle of coefficients in the numerators of rational functions in tanh(1) that express the (2n)th du Bois-Reymond constants as C_0 = 0, C_2 = -4 - 1/(1-tanh(1)), for n>1, C_2n = -3 - (Sum_{k=0..n} a(n,k)*tanh(1)^k) / (2^n*n! * (1-tanh(1))^n).at n=31A104053
• Difference between the cubes and 2*tetrahedral numbers; A000578(n) - 2*A000292(n).at n=35A146298
• Terms in A046034 which are pairwise products of terms in A046034.at n=27A153446
• a(n) = smallest k having at least four prime divisors d such that (d + n) | (k + n).at n=24A202159
• Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| > w+x+y.at n=30A213482
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 107", based on the 5-celled von Neumann neighborhood.at n=33A270166
• 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 206", based on the 5-celled von Neumann neighborhood.at n=15A279829
• 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 654", based on the 5-celled von Neumann neighborhood.at n=14A283588
• Relative of Hofstadter Q-sequence: a(n) = max(0, n+27298) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0.at n=36A283888
• Numbers k such that A008475(k)+1 = A008475(k+1).at n=34A333801
• Numbers k such that 6*k + 1 is a prime that can be written as p*q + 2, with p and q being consecutive primes.at n=15A342564