29928

Appears in sequences

• a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026714.at n=6A027202
• a(n) = (prime(n)-1)*(prime(n)+1).at n=39A084920
• Numbers sandwiched between two numbers having only one prime divisor (at least) one of which is composite.at n=34A088072
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=23A089952
• Number of Smith numbers below 10^n.at n=5A104170
• Nonsquarefree numbers such that n-1 is prime and n+1 is square.at n=38A146980
• Maximum coefficient of the polynomial (-1)^(n+1)*Product_{k=1..n} (1 - x^k)^2.at n=27A156082
• Numbers k such that 3^k + 10 is prime.at n=25A217137
• Numbers of the form p^2 - 1 where p is a prime of the form 3*k-1 (A003627).at n=20A301812
• Numbers such that the two adjacent integers are a prime and the square of another prime.at n=18A347194
• Absolute value of the minimum coefficient of (1 - x)^2 * (1 - x^2)^2 * (1 - x^3)^2 * ... * (1 - x^n)^2.at n=28A380499