19967

Appears in sequences

• Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 4 (mod 5).at n=49A035570
• Central coefficients of Moebius polynomials (A074586): coefficient of x^(n/2-1/2) if n is odd; coefficient of x^(n/2-1) if n is even and >4. The n-th Moebius polynomial, M(n,x), satisfies M(n,-1)=mu(n) the Moebius function of n.at n=15A077596
• Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6 which is flat, i.e., with all blocks in parallel position and symmetric after a rotation by 180 degrees.at n=8A123797
• A sequence of asymptotic density zeta(10) - 1, where zeta is the Riemann zeta function.at n=19A143036
• a(n) = 78*n^2 - 1.at n=15A158771
• Number of lines through at least 2 points of an 8 X n grid of points.at n=37A160848
• Row sums of triangle defined in A113821.at n=33A160969
• Integers n such that exactly 80 percent of the digits in base 2 are 1's.at n=42A163142
• Number of zero-sum -3..3 arrays of n elements with first through third differences also in -3..3.at n=9A202506
• Odd numbers n such that the sum of the binary digits of n and n^2 both equal 12.at n=16A261593
• Starting at n, a(n) is the number of times we travel to a position already visited according to the following rules. On the k-th step (k=1,2,3,...) move a distance of k in the direction of zero. If the number landed on has been landed on before, move a distance of k away.at n=39A324674
• Unitary Ruth-Aaron numbers: numbers k such that A008475(k) = A008475(k+1).at n=17A331000