40193

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 87.at n=30A020426
• Expansion of Product_{m>=1} (1-m*q^m).at n=41A022661
• Primes p such that |p - q| is a square, where q is the reversal of p.at n=38A059798
• Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3.at n=28A074709
• Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3 (primitive values of n only).at n=25A074900
• Non-palindromic primes which on subtracting their reversal give perfect squares.at n=17A080177
• Largest prime factor of 3^n-2.at n=12A080798
• Primes of the form 512n+257.at n=14A105131
• Central terms of the triangle in A119258.at n=6A119259
• Primes of the form k * m^m + 1 with k < m^m.at n=40A180362
• a(n) = (1+(A034939(n))^2)/5^n.at n=9A199206
• Primes of the form 256*k + 1.at n=30A208178
• a(n) = (A048898(n)^2 + 1)/5^n, n >= 0.at n=9A210848
• Expansion of 1/((1-2*x)^6*(1-x)).at n=6A211388
• Number of nondecreasing sequences of 5 1..n integers with no element dividing the sequence sum.at n=22A212872
• Primes of the form 384*k + 257.at n=32A229856
• Numbers k such that 4^k - 2^k - 3 is prime.at n=19A255682
• Coordination sequence for (3,3,5) tiling of hyperbolic plane.at n=23A265072
• Square array read by antidiagonals: T(n,k) = Sum_{j = 0..n*k} binomial(n+j-1,j)*2^j; n,k >= 0.at n=29A333560
• Primes p such that 2*p^2 - 7, 2*p^2 - 1, and 2*p^2 + 3 are prime.at n=8A356510