42147

Appears in sequences

• Number of 2 X 2 matrices having all elements in {0,1,...,n} and determinant in the open interval (-n,n).at n=21A211032
• Integers n such that 10^n + 5^n + 2^n is a prime.at n=13A276741
• Numbers n such that (6k-1) for k=n, n+1, n+2, n+3 are all primes with no primes of the form (6k+1) in between.at n=37A296011
• Numbers that are the sum of seven fourth powers in exactly eight ways.at n=29A345830