5654884

Appears in sequences

• Perfect powers k such that 2*k + 1 is a perfect power; the value of y^b in the solution of the Diophantine equation x^a - 2y^b = 1.at n=5A075114
• Squares of Pell numbers.at n=10A079291
• Squares k such that 2*k+1 is also a square.at n=5A084703
• a(n) = 2*a(n-1) + 2*a(n-3) + a(n-4), with a(0)=1, a(1)=2, a(3)=4, a(4)=10.at n=18A089928
• Number of nX3 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors.at n=17A183370
• A204512(n)^2 = floor[A055872(n)/8]: Squares such that appending some digit in base 8 yields another square.at n=12A204504
• List of pairs of consecutive integers such that one of them is a square and their sum is also a square.at n=18A331261