28297

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 92 ones.at n=26A031860
• Numbers n such that n_0=n_1=n_2, where n_i = (n+i)-th prime - sigma(n+i) - phi(n+i).at n=2A048791
• Primes followed by a [10,2,10] prime difference pattern of A001223.at n=26A052376
• Fifth term of weak prime sextet: p(m-3)-p(m-4) < p(m-2)-p(m-3) < p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m).at n=9A054832
• Primes p such that p and p^2 have same digit sum.at n=35A058370
• Number of ways to build a contiguous building with n LEGO blocks of size 1 X 4 on top of a fixed block of the same size so that the building is symmetric after a rotation by 180 degrees.at n=6A123783
• Primes in the sequence A003294 of certain fourth powers bases.at n=24A134820
• Numbers k such that k and k^2 use only the digits 0, 2, 7, 8 and 9.at n=8A136925
• Prime numbers p such that p +- ((p-1)/6) are primes.at n=30A137724
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X3 U in any orientation.at n=12A146056
• Prime p1 of consecutive primes p1, p2, where p2-p1=10, and p1, p2 are in different centuries.at n=31A160500
• Primes p such that 2*p + 1 is abundant.at n=31A267476
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 505", based on the 5-celled von Neumann neighborhood.at n=32A272583
• Expansion of Product_{k>=1} (1 + x^k)^ceiling(k/2).at n=28A319106
• Indices of tetrahedral numbers that are Fermat pseudoprimes to base 2.at n=3A321866
• Prime numbersat n=3082