27886

Appears in sequences

• Base-9 palindromes that start with 4.at n=40A043031
• Numbers k such that k and k^2 use only the digits 2, 6, 7, 8 and 9.at n=9A137118
• Number of reduced words of length n in the Weyl group B_9.at n=10A161733
• a(n) = smallest number k such that three consecutive prime numbers prime(n), prime(n+1) and prime(n+2) are divisors of k, k+1 and k+2 respectively.at n=20A180095
• a(n) = prime(n)^2-3.at n=38A182200
• Number of length n inversion sequences avoiding the patterns 000 and 010.at n=10A279552
• Number of 6-cycles in the n X n king graph.at n=16A288920
• a(n) = Sum_{0<=i<=j<=k<=n} (-1)^(i+j+k) * (i+j+k)!/(i!*j!*k!).at n=4A307358