25321

Properties

Appears in sequences

• Denominators of continued fraction convergents to sqrt(368).at n=6A041697
• Numbers k such that 4*10^k + 3*R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=19A056707
• Numerators in expansion of exp(exp(x)-1)/(2-x).at n=9A058815
• Primes with 19 as smallest positive primitive root.at n=22A061331
• Right diagonal of triangle in A072467.at n=23A072469
• Lesser of two consecutive primes, p < q, such that both p*q+p-q and p*q-p+q are prime numbers.at n=31A154553
• Primes in A161190.at n=33A161191
• Consecutive pairs of prime point sums in A161191 (includes triples).at n=15A161192
• a(1)=5; thereafter a(2n) = nextprime(a(2n-1)^2), a(2n+1) = nextprime(floor(2*a(2n)/(a(2n-1) + 1))) where nextprime(.) is A007918(.).at n=24A181616
• Stack polyominoes with square core.at n=46A188674
• Primes with nonzero digits such that sum of cubes of digits equal to square of sums.at n=9A225567
• Primes p such that f(f(p)) is prime, where f(x) = x^4 + x^3 + x^2 + x + 1 = A053699(x).at n=28A237445
• Primes of form n^2 + 1296.at n=18A256834
• Primes in A114381.at n=35A345099
• Primes p such that if q is the next prime, p+A004086(q) and q+A004086(p) are prime.at n=25A351728
• Primes p that can be written as phi(k) + d(k) for some k, where phi(k) = A000010(k) is Euler's totient function and d(k) = A000005(k) is the number of divisors of k.at n=29A357916
• Number of stones-and-bones tilings of an n-triangle.at n=8A377309
• Number of compositions of n such that any part 1 can be k different colors where k is the current record having appeared in the composition.at n=10A383275
• Prime numbersat n=2793