26161

Properties

Appears in sequences

• Primes whose consecutive digits differ by 4 or 5.at n=24A048416
• Primes p whose reciprocal has period (p-1)/10.at n=36A056215
• Numbers n of the form k + reverse(k) for exactly three k.at n=39A071914
• Expansion of (1+x^2)/(1-x-x^5) = (1+x^2)/((1-x+x^2)*(1-x^2-x^3)).at n=37A098523
• Primes p of Erdos-Selfridge class 4+ with largest prime factor of p+1 not of class 3+.at n=21A129472
• Prime numbers p such that p +- ((p-1)/5) are primes.at n=23A137714
• Let S be the set of positive integers that, when written in binary, exist as substrings in the binary representation of n. a(n) = number of partitions of n into parts that are all members of S. Each part may occur any number of times in a partition.at n=51A175359
• a(n) = smallest prime > a(n-1) such that a(n)+a(n-1) is multiple of k, a(1)=2, k=101.at n=36A178468
• Primes p with A047967(p) also prime.at n=18A236418
• Primes p such that p^3-2 and p^2-2 are both primes.at n=32A242979
• Primes of the form 9x^2 + 6xy + 1849y^2.at n=51A244019
• Initial primes of sets of 8 consecutive primes all different by modulo 30.at n=50A248199
• Primes of form n^2 + 6561.at n=16A256837
• Primes p such that both 2p-1 and 2p^2-2p+1 are prime.at n=30A274609
• Value of prime number D for incrementally largest values of minimal x satisfying the equation x^2 - D*y^2 = 3.at n=23A336794
• Value of prime number D for incrementally largest values of minimal y satisfying the equation x^2 - D*y^2 = 3.at n=22A336796
• Primes p such that p, x+y, x-y, p-x*y and p+x*y are prime, where y = p mod 5 and x = (p-y)/5.at n=27A342771
• Primes having only {1, 2, 6} as digits.at n=30A385774
• Prime numbersat n=2875