127281

Appears in sequences

• Coefficients of Chebyshev polynomials.at n=17A005584
• Odd numbers to the left of the central elements of the (1,2)-Pascal triangle A029635.at n=59A029646
• Odd numbers to the right of the central elements of the (2,1)-Pascal triangle A029653 that are different from 1.at n=34A029668
• G.f.: 1/((1-x)*(1-x^2))^3.at n=37A038163
• Expansion of (3+x)/(1-x)^6.at n=18A059599
• Product of the largest prime divisors of composite numbers between successive primes.at n=15A076977
• Delete first column (index 0) and all rows having nonprime index of triangle T(p,k) defined in A034807 (coefficients of Lucas polynomials). Sequence gives resulting sub-triangle read by rows.at n=51A096539
• Number of jumps in all even trees with 2n edges.at n=7A127534
• Number of (w,x,y,z) with all terms in {1,...,n} and w*x>3*y*z.at n=27A211918
• Numbers that have exactly 7 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3.at n=29A321157