A065777 a(1) = 4; for n > 1, a(n) is the square root of the smallest square > a(n-1)^2 with a(n-1)^2 forming its final digits.
4, 46, 2454, 314954, 4492502454, 8866500849999685046, 4716968811408150949999999995507497546, 8302295225692406203256091732061577875000000000000000008866500849999685046
Offset: 1
Extensions
More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Dec 18 2001