371136domain: NAppears in sequencesNumbers whose set of base 13 digits is {0,C}, where C base 13 = 12 base 10.at n=29A097259E.g.f.: (cosh(3*x) + sinh(3*x)*cosh(x)) / sqrt(1 - sinh(x)^2*sinh(3*x)^2).at n=7A245154