25879

Appears in sequences

• a(n) = A027170(2n, n-1).at n=6A027173
• a(i) is a square mod a(j), i <> j.at n=23A034903
• Numbers n such that 103*2^n-1 is prime.at n=22A050577
• Counterexamples to the conjecture that an even, prime-indexed triangular plus 1 equals a prime or that an odd, prime-indexed triangular minus 2 equals a prime.at n=17A097785
• Pyramid game person numbers that have integer solutions.at n=28A135051
• Riordan matrix (1/(1-4x),(1-sqrt(1-4x))/(2*sqrt(1-4x))).at n=39A188481