168245

Appears in sequences

• Number of positive integers <= 2^n of form x^2 + 6 y^2.at n=20A000077
• Coefficients of Chebyshev polynomials.at n=18A005584
• Odd numbers to the right of the central elements of the (2,1)-Pascal triangle A029653 that are different from 1.at n=38A029668
• Odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle.at n=39A046200
• Odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle.at n=42A046200
• Distinct odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle.at n=21A046201
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-1)/2.at n=25A047175
• Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-2)/2.at n=25A047186
• Denominator of 1/3 + 1/7 + 1/11 + ... + 1/(4n-1).at n=5A074638
• Final members of groups in A076031.at n=6A076028
• Group the natural numbers so that the n-th group contains the smallest still-available set of n numbers whose product is a square.at n=27A076031
• A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=37A094952
• Sum of jump-lengths of all even trees with 2n edges.at n=7A127536
• a(n) = n*binomial(n+4, 4).at n=19A174002
• Coefficient array for the third power of the monic integer Chebyshev polynomials 2*T(2*n,x/2) as a function of x^2.at n=44A219236
• Denominators of r(n) = r(n-1) + r(n-2) + B_(n-2), where B_n is the n-th Bernoulli number A027641(n)/A027642(n).at n=26A228151
• Triangle read by rows: T(n,k) = number of connected matchings with n crossings and k chords, in a disk, k=2..n+1.at n=43A232223
• a(n) = A332560(n)/A332559(n).at n=18A332561
• a(n) is the number of subsets of {1..n} that contain exactly 1 odd and 4 even numbers.at n=45A333321