261696

Appears in sequences

• a(n) = 6*a(n-1)-8*a(n-2) for n > 1; a(0) = 57, a(1) = 242.at n=6A176635
• Least k such that p = k^2 + 1 and q = (k+2n)^2 + 1 are prime numbers with q - p square.at n=28A339007