recursively defined sequence

alae scale concentric-nose vessel dendrite propagation euthenic Exobasidiales feesimple filled band Guelma, Wilaya de Ichimoku Kinko Hyo Klippel-Weil sign machine bolt pre take off stage ptcas Second Epistle of Paul the Apostle to the Corinthi shifted diagonal summerskill swing-out Thomas-Gilchrist process trapezoidal wave generator variable name conflict