2667941domain: NPropertiesPrimalityPrimeyesAppears in sequencesExpansion of 1/(x + sqrt(1-4x)).at n=13A081696Number of lattice paths from (0,0) to (i,n-2*i) that do not go above the diagonal x=y using steps in {(1,0), (0,1)}.at n=39A357654Prime numbersat n=194477