1485120

Appears in sequences

• a(n) = 5*(n+1)*binomial(n+3,6).at n=12A027791
• a(n) = 91*(n+1)*binomial(n+3,14)/3.at n=4A027799
• Largest integer m such that m divides (sigma_(2n+1)(2k-1)-sigma(2k-1)) for all k>=1.at n=23A081863
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,3].at n=41A292219
• Indices k of records of low value in the ratios A319696(k)/A000005(k) between the number of distinct values of the Euler totient function applied to the divisors of k and the number of divisors of k.at n=18A328859
• Triangular array T(n,k) read by antidiagonals: T(2,1) = 1; otherwise T(n,k) = p(n)!/(p(k)!*p(n-k)!), where p(0)=1 and p(m)=prime(m) for m > 0.at n=30A360207
• Triangular array T(n,k) read by antidiagonals: T(2,1) = 1; otherwise T(n,k) = p(n)!/(p(k)!*p(n-k)!), where p(0)=1 and p(m)=prime(m) for m > 0.at n=33A360207
• Number of vertices in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.at n=39A368814