1187452domain: NAppears in sequencesDifference between 2^n and largest square strictly less than 2^n.at n=41A056007Values of r in Wolfram's iteration for sqrt(2).at n=20A095803Differences between odd powers of 2 and the next smaller square.at n=20A201125Difference between 2^(2n-1) and the nearest square.at n=20A236564