25609

Properties

Appears in sequences

• a(n) = 12*a(n-1) + 11*a(n-2).at n=5A015612
• Primes p such that p, p+12, p+24 are consecutive primes.at n=25A052188
• Greatest prime factor of prime(n+1)^2 + prime(n)^2.at n=36A069485
• Average of squares of successive primes: a(n) = (prime(n+1)^2 + prime(n)^2)/2, with n >= 2.at n=35A075892
• Number of n-celled polyominoes with exactly 4 holes.at n=19A089456
• Primes of form (prime(n)^2 + prime(n+1)^2)/2.at n=6A093343
• Smallest odd prime p such that n = (p - 1) / ord_p(2).at n=43A101208
• Start with the empty list; for k = 1..oo, append to the list the smallest prime of the form k*m^3+m+1 with m>0 if such a prime exists, otherwise skip this value of k.at n=46A114365
• Prime averages of two successive perfect prime powers.at n=6A131697
• Primes of the form k^2 + 9.at n=20A138353
• Lesser of two consecutive primes, p < q, such that both p*q+p-q and p*q-p+q are prime numbers.at n=32A154553
• P(n,k) is an array read by rows, with n > 0 and k=1..5, where row n gives the chain of 5 consecutive primes {p(i), p(i+1), p(i+2), p(i+3), p(i+4)} having the symmetrical property p(i) + p(i+4) = p(i+1) + p(i+3) = 2*p(i+2) for some index i.at n=6A267028
• Numerators of the partial sums of the squares of the expansion coefficients of 1/sqrt(1-x). Also the numerators of the Landau constants.at n=4A277233
• T(n,k) is the number of non-equivalent distinguishing partitions of the cycle on n vertices with exactly k parts. Regular triangle read by rows, n >= 1, 1 <= k <= n.at n=72A324802
• Prime numbers congruent to 1 or 169 modulo 240 representable by both x^2 + 150*y^2 and x^2 + 960*y^2.at n=34A325087
• Primes p such that if q is the next prime, p+A004086(q) and q+A004086(p) are prime.at n=27A351728
• Smallest prime p such that the multiplicative order of 4 modulo p is 2*n, or 0 if no such prime exists.at n=43A372797
• Prime numbersat n=2821