26350

Appears in sequences

• Numbers k such that 2^k - 3 is prime.at n=40A050414
• Reverse of largest prime factor of n = smallest prime factor of n+1; a(1)=1.at n=20A071393
• Number of factorizations of m^n into 3 factors, where m is a product of exactly 3 distinct primes and each factor is a product of n primes (counted with multiplicity).at n=32A257464
• Number of nX7 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.at n=1A266054
• T(n,k)=Number of nXk integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.at n=29A266055
• Number of 2Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.at n=6A266056
• a(n) = n*(2*n - 3 - (-1)^n)*(11*n + (-1)^n)/24.at n=30A308026