370169249domain: NPropertiesPrimalityPrimeyesAppears in sequencesSum of all matrix elements of n X n matrix M[i,j] = Lucas[i+j-1], (i,j = 1..n), where Lucas[n] = A000032[n] = Fibonacci[n-1] + Fibonacci[n+1].at n=18A120537Prime numbersat n=19826974