350823718557domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(10).at n=15A005667Numerators of continued fraction convergents to sqrt(250).at n=20A041468a(n) = sinh((2n-1)*arcsinh(3)).at n=8A173127a(n) = 6*a(n-2) + a(n-4), where a(0) = 3, a(1) = 5, a(2) = 19, a(3) = 31.at n=28A228471