27539

Properties

Appears in sequences

• Primes p whose period of reciprocal equals (p-1)/7.at n=23A056212
• a(n) = least denominator Y of the proper fractions X/Y which need n or more terms as an Egyptian fraction.at n=7A097048
• Primes of the form : (p-n)/(n+1)=prime and (n+1)*p+n=prime. n=4.at n=35A152294
• Primes p of the form 4*k+3 such that p+2 is prime and p-1 is nonsquarefree.at n=25A175606
• Number of nonisomorphic graded posets with 0 of rank n with no 3-element antichain.at n=7A206901
• Primes of the form 2*n^2+26*n+11.at n=31A243888
• Lesser of twin prime pairs of the form (40n - 21, 40n - 19).at n=39A250025
• a(2n-1) and a(2n) represent the smallest fraction a(2n-1)/a(2n) needing n unit fractions.at n=15A285261
• Primes p such that if q is the next prime, (p+q)/6 is a triangular number.at n=40A356293
• G.f.: Sum_{k>=0} x^(k*(k+1)/2) * Product_{j=1..k} 1/(1 - x^j)^4.at n=17A376710
• Prime numbersat n=3008