53129

Properties

Appears in sequences

• Expansion of (2 + x + x^2)/((1 - x)*(1 - x - x^2)).at n=19A026390
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= sqrt(n).at n=24A048093
• Numbers k such that x^k + x^8 + 1 is irreducible over GF(2).at n=12A057478
• Smaller of two consecutive primes whose sum is a square.at n=21A061275
• a(n) = binomial(n+6,5) - 1.at n=19A062988
• Lesser of consecutive primes whose sum is a perfect power (A001597).at n=27A091624
• A proximate-prime polynomial sequence generated by 2*n^2 - 2*n + 53089.at n=4A155557
• Primes of the form (p^2-1)/4-p where p are also primes.at n=35A165557
• Primes of the form p^2 +3p + 1, where p is also a prime.at n=20A165944
• Primes of the form prime(n+2)*prime(n+1) - prime(n) +- 1.at n=30A294625
• Prime numbersat n=5421