48720

Appears in sequences

• Denominators of continued fraction convergents to sqrt(839).at n=7A042621
• Triangle read by rows, the Bell transform of n!*binomial(2,n) (without column 0).at n=40A049404
• Reduced denominators of the coefficients in a series expansion for Gamma[x].at n=26A054380
• One half of A075178.at n=27A075179
• Ordered m for which m = k^3*a*b*(a^4 - b^4) determine (unique) solution triples(k,a,b), where k=1,2,3,... and (a,b) are coprime pairs, not both odd (i.e., of opposite parity).at n=27A081779
• Convolution of sequence of primes with sequence sigma(n).at n=36A086718
• Generalized Stirling2 array (-1,2)S2. Irregular triangle a(n, m) for n >= 1 and 2 <= m <= 2*n.at n=31A091752
• Seventh column (m=8) of array A091752 ((-1,2)Stirling2).at n=2A091756
• Numbers that can be expressed as the difference of the squares of primes in exactly six distinct ways.at n=28A092002
• Triangle read by rows: T(n,k) = n!*Pell(n-k+1)/k!, where Pell(n)=A000129(n).at n=40A110327
• Triangle related to the asymptotic expansion of E(x,m=4,n).at n=33A163934
• Third right hand column of triangle A163934.at n=5A163935
• First bisection of A164869.at n=28A164877
• Molecular topological indices of the cocktail party graphs.at n=14A181773
• Numbers with prime factorization p*q*r*s*t^4 (where p, q, r, s, t are distinct primes).at n=8A190110
• Number of admissible 2-dimensional lattice patterns of type Sigma(2,3,5).at n=15A220843
• T(n,k)=Number of pairs of orthogonal (-x,y) vectors of length k*(x+y), where x/y is the n-th rational <= 1, ordered first by y and then x, e.g. 1/1, 1/2, 1/3, 2/3, 1/4, 3/4 ...at n=13A225987
• Number of pairs of orthogonal (-2,3) vectors of length 5*n.at n=1A225990
• Integer areas A of integer-sided cyclic quadrilaterals such that the circumradius is of prime length.at n=20A230136
• a(n) is the number of 2 X 2 matrices over Z_p with determinant in {1,-1} where p = prime(n).at n=9A262354