23539

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of the function f(x) = 9x + 8.at n=11A023326
• Odd prime values of sigma(k) - phi(k) taking k in increasing order.at n=40A068419
• Primes for which the weight as defined in A117078 is 11 and the gap as defined in A001223 is 10.at n=27A119596
• G.f.: A(x) = Product_{n>=1} G(x^n,n)^n where G(x,n) = 1 + x*G(x,n)^n.at n=15A134774
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 10 : primes in A146335.at n=16A146355
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.at n=8A149695
• Primes of the form 7n^2 - 9.at n=13A201854
• Lesser of consecutive primes whose sum is of the form k*(k+2), for some integer k.at n=24A242384
• Greater of twin primes of (40n-23,40n-21).at n=32A244505
• Primes p such that 2*p + 11 is a square.at n=31A269784
• a(n) is the smallest prime not yet in the sequence such that pi(a(n)) divides the sum a(n) + n, or -1 if no such prime exists.at n=13A377788
• G.f. A(x) satisfies 1 + 4*A(x) = Sum_{n>=0} (x + 3*A(x)^n)^n.at n=7A380063
• Prime numbersat n=2617