75511

Properties

Appears in sequences

• Prime numbers with odd digits in descending order.at n=39A061245
• Numbers k such that k concatenated with k-7 gives the product of two numbers which differ by 3.at n=3A116110
• Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 1.at n=4A116120
• Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 3,2 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=7A155288
• Primes 6k + 1 at the end of first-occurrence gaps in A330853.at n=19A330855
• a(n) = Sum_{k=0..n} (-1)^k * binomial(n+k+1,n-k) * Fibonacci(k+1).at n=16A390852
• Prime numbersat n=7437