a(n) = (48^n - 1)/47.A218751a(n) = (48^n - 1)/47.Terms a(0) =0a(1) =1a(2) =49a(3) =2353a(4) =112945a(5) =5421361a(6) =260225329a(7) =12490815793a(8) =599559158065External referencesoeis: A218751