207900

Appears in sequences

• A triangle of numbers related to triangle A049325.at n=38A049410
• There are exactly n integer-sided triangles of area a(n).at n=42A051586
• Triangle T(n,k) of k-block ordered tricoverings of an unlabeled n-set (n >= 3, k = 4..2n).at n=11A060492
• Triangle of coefficients of Bessel polynomials {y_n(x)}'.at n=31A065931
• Triangle of coefficients of Bessel polynomials {y_n(x)}''.at n=24A065943
• Triangle T(n, k) of numbers of square lattice walks that start and end at origin after 2*n steps and contain exactly k steps to the east, possibly touching origin at intermediate stages.at n=25A069466
• Triangle T(n, k) of numbers of square lattice walks that start and end at origin after 2*n steps and contain exactly k steps to the east, possibly touching origin at intermediate stages.at n=23A069466
• Denominator of b(n), where b(n+1) = Sum_{k=0..n} b'((n^2-k^2)/n), b(0) = b(1) = 1, and b'(x) = b(x) if x is an integer and is linearly interpolated otherwise.at n=13A071301
• One-sixth of the area of some primitive Heronian triangles with a distance of 2n+1 between the median and altitude points on the longest side.at n=15A074076
• a(n) = smallest number which can be expressed as sum of d consecutive positive integers in exactly n ways (where d>0 is a divisor of the number).at n=30A082637
• Triangle T(n,k) read by rows: multiply row n of Pascal's triangle (A007318) by A001147(n).at n=24A085881
• Triangle, read by rows, where T(n,k) = n!/(k!*(n-4*k)!*4^k) for n>=4*k>=0.at n=23A118933
• (n-1)! divided by (product phi(d)! ; d divides n).at n=11A120066
• Denominator of Sum_{k=1..n} H(k)*H(n+1-k), where H(k) is the k-th harmonic number (Sum_{j=1..k} 1/j).at n=11A130895
• Denominator of Sum_{k=1..n} H(k)*H(n+1-k), where H(k) is the k-th harmonic number (Sum_{j=1..k} 1/j).at n=10A130895
• Duplicate of A069466.at n=25A141902
• Duplicate of A069466.at n=23A141902
• a(n) = n$ / A055773(n), where n$ denotes the swinging factorial (A056040).at n=35A182923
• Numbers with prime factorization pqr^2s^2t^3.at n=3A190386
• Number of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y>=3z.at n=36A212515