Are there any applications of Ramanujan-Nagell equation other than its appearance in the "error-correcting codes" and "differential algebra"?

Ramanujan-Nagell equation is: 2n - 7 = x2 with positive solutions: (n, x) = (3,1), (4, 3), (5, 5), (7, 11) and (15, 181). References to the applications:  H. S. Shapiro and D. L. Slotnick, "On...

01 March 2015 7,479 3 View