9224297domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes arising in A090525, or 0 if A090525(n) = 0.at n=7A090526a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 1,1,1,1.at n=17A135344Partial sums of round(3^n/7).at n=16A178703Prime numbersat n=616445