18828

Appears in sequences

• Numbers that are the sum of 5 positive 7th powers.at n=28A003372
• Expansion of cos(log(1+x))/cosh(x).at n=9A009026
• Conjectured formula for irreducible 5-fold Euler sums of weight 2n+13.at n=47A019450
• Number of fibered rational knots with n crossings.at n=23A051449
• Largest achievable determinant of a 3 X 3 matrix whose elements are 9 distinct nonnegative integers chosen from the range 0..n.at n=16A097401
• Potential magic constants of a 10 X 10 magic square composed of consecutive primes.at n=25A192087
• Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns.at n=4A221769
• Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns.at n=1A221772
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns.at n=16A221773
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns.at n=19A221773
• Initial members of abundant quadruplets, i.e., values of k such that (k, k+2, k+4, k+6) are all abundant numbers.at n=31A231089
• Number of compositions of n into parts {3,4,5} when all parts 3,4 and 5 are present.at n=28A243254
• Number of length 1+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.at n=10A249291
• Coefficients in q-expansion of (E_2*E_4 - E_6)^2/518400, where E_2, E_4, E_6 are the Eisenstein series shown in A006352, A004009, A013973, respectively.at n=6A281371
• T(n, k) = Sum_{j=0..k} binomial(n, k - j)*Stirling1(n - k + j, j)*(-1)^(n-k). Triangle read by rows, T(n, k) for 0 <= k <= n.at n=38A341101