342161domain: NAppears in sequencesNumber of positive integers <= 2^n of form 3 x^2 + 10 y^2.at n=22A054167Number of 2 X 2 matrices with all terms in {0,1,...,n} and even determinant.at n=26A210369Number of compositions of n if only the order of the even numbers matter.at n=35A275592