215280

Appears in sequences

• Seventh column of Catalan triangle A009766.at n=15A064059
• Integers that are the arithmetic mean of 1000 consecutive primes.at n=27A123078
• a(n) = 256*n^2 - 16.at n=28A158562
• Triangle read by rows: row n gives coefficients of expansion of polynomial p(k,n) in powers of k, defined by p(k, 0) = 1, p(k, 1) = 1+2*k; for n>1, p(k,n) = If[Mod[n, 2] == 0, (1 + 2*k)*p(k, n - 1) + n*Binomial[n + 1, n - 1]*k*(k + 1)*p(k, n - 2), (1 + 2*k)*(1 + 3*(p(k, n - 1) - 1))].at n=26A167883
• Integer areas A of integer-sided cyclic quadrilaterals such that the circumradius is of prime length.at n=37A230136
• Triangle, read by rows, T(n,k) = 2*k*C(2*(n+k),n-k)/(n+k).at n=48A257501
• a(n) = n*(n + 7)*(n + 14)*(n + 21)*(n + 28)/120.at n=18A264449
• Numbers of the form Bell(i)*Bell(j).at n=35A276281
• Denominators of the partial sums of the reciprocals of the numbers (k + 1)*(5*k + 3) = A147874(k+2), for k >= 0.at n=4A294829
• Number of bracelets (turnover necklaces) of length n that have no reflection symmetry and consist of 6 white beads and n-6 black beads.at n=44A308401
• Triangle read by rows: T(n,k) gives n! times the coefficient of x^k in the polynomial that describes the number of permutations on x letters with major index n.at n=46A342645