1299869domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = a(n-1) + a(n-2) + n + 3 with n>1, a(0) = a(1) = 0.at n=26A210731Number of nonempty subsets of {1..n} whose product is divisible by their sum.at n=22A326156Prime numbersat n=100012