67298

Appears in sequences

• Theta series of A*_22 lattice.at n=45A023934
• Partial products of A060191.at n=4A060193
• Seventh column of Catalan triangle A009766.at n=11A064059
• a(n) = 12 * C(2n+1,n-5) / (n+7).at n=6A090749
• Convolution of A008805 (triangular numbers repeated) with itself.at n=37A177747
• a(n) = lcm(n,n+1,n+2,n+3,n+4,n+5)/60.at n=19A189046
• Central terms of the triangle in A208101.at n=11A208983
• Triangle, read by rows, T(n,k) = 2*k*C(2*(n+k),n-k)/(n+k).at n=38A257501
• Number of ways 2*n-1 people can vote on three candidates so that the Condorcet paradox arises.at n=19A277935
• Squarefree primitive abundant numbers (first definition: having only deficient proper divisors).at n=46A298973
• a(n) = 332640*4^n*Gamma(n + 1/2)/(sqrt(Pi)*Gamma(n + 7)); super ballot numbers, row 5 of A135573.at n=12A348899
• a(n) = A128899(2*n, n) = 2*binomial(4*n - 1, 3*n) for n >= 1 and a(0) = 1.at n=6A359108
• a(n) is the product of the first n primes that are coprime to a(n-1); a(0) = 1.at n=5A362364