49495domain: NAppears in sequencesNumbers k such that k^12 == 1 (mod 13^4).at n=19A056095Numbers n such that nextprime(n^2)-n^2 (n>=1) sets a new record.at n=24A070316Sum of determinants of 2nd order principal minors of powers of the matrix ((1,1,0,0),(1,0,1,0),(1,0,0,1),(1,0,0,0)).at n=23A074193