52185

Appears in sequences

• Expansion of 1/((1-2x)(1-4x)(1-7x)).at n=5A016285
• Numbers n such that phi(n) + phi(n+1) = sigma(n)/2.at n=18A076647
• Values that show the slow decrease in the Andrica function Af(k) = sqrt(p(k+1)) - sqrt(p(k)), where p(k) denotes the k-th prime.at n=21A084977
• The values of a in a^2 + b^2 = c^2 where b - a = 23 and gcd(a,b,c)=1.at n=9A117476
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x + 23)^2 = y^2.at n=14A118337
• Numbers k such that 2*k-1, 4*k-1, 6*k-1 and 8*k-1 are primes.at n=26A124487
• Numbers k for which 2*k-1, 4*k-1, 8*k-1 and 16*k-1 are primes.at n=37A124494
• Number of reduced words of length n in Coxeter group on 7 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=6A162941
• Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 3 X n array.at n=33A219520