a(n) = 17*((100^(n+1) - 1)/99).A156675a(n) = 17*((100^(n+1) - 1)/99).Terms a(0) =17a(1) =1717a(2) =171717a(3) =17171717a(4) =1717171717a(5) =171717171717External referencesoeis: A156675