391387domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p that remain prime through at least 3 iterations of function f(p)=p^2+4.at n=10A116887Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4.at n=10A196631Prime numbersat n=33181