48279

Appears in sequences

• Coefficient of x^5 in expansion of (1 + x + x^2)^n.at n=18A000574
• a(n) = 11*binomial(2n,n-5)/(n+6).at n=6A000589
• Row sums of array in A055450.at n=8A055451
• A diagonal of A036969.at n=9A060493
• Seventh column of Catalan triangle A009766.at n=10A064059
• Intersection of A065764 and A065765: n such that x and y exist with sigma[x^2] = n = sigma[2*(y^2)].at n=4A065767
• A number triangle of lattice walks.at n=48A107842
• Denominators associated with A120031.at n=11A120032
• a(1) = 1; a(2) = 0; a(3) = 0; a(4) = 0; a(5) = 0; a(6) = 0; a(7) = 0; a(8) = 0; a(9) = 0; a(10) = 0; a(n) = a(n - 1) + 9a(n - 2) - 8a(n - 3) - 28a(n - 4) + 21a(n - 5) + 35a(n - 6) - 20a(n - 7) - 15a(n - 8) + 5a(n - 9) + a(n - 10) for n >= 11.at n=23A122602
• Triangle read by rows: T(n,k) = (4k+3)/(n+2k+2)*binomial(2n,n+2k+1).at n=33A158483
• The Wiener index of the nanostar dendrimer defined pictorially in Fig. 1 of the Iranmanesh et al. reference.at n=0A227701
• a(n) = (n-1)*binomial(3*n-2,n)/(2*n-1) + (n+1)*binomial(3*n,n)/(2*n+1) - binomial(3*n-1,n).at n=8A262717
• Number of set partitions of [2n] with maximal block length multiplicity equal to n.at n=6A271425
• Number of set partitions of [n] with maximal block length multiplicity equal to six.at n=6A271735
• Odd numbers m such that sigma(x) = m has more than 1 solution.at n=18A300869
• a(n) is the numerator of Product_{i=0..n-1} (n-i)^((-1)^ceiling(i/2)).at n=21A337354
• Numbers k such that k, k^2-1 and k^2+1 are all fine, where a number m is fine if its prime factors are all less than m^(1/3).at n=8A345896
• Numbers k such that sigma(k) = psi(k) + tau(k)^2 + omega(k)^3.at n=19A392520