759250124domain: NAppears in sequencesa(0)=1, a(n+1) = 2*a(n) + b(n+2), where b(n)=A004539(n) is the n-th bit in the binary expansion of sqrt(2).at n=29A084188Values of s in Wolfram's iteration for sqrt(2).at n=28A095804Integers n such that n^2 + k is a Mersenne number 2^m - 1 for some k such that n < k < 2 * n and m odd.at n=13A144934