20D60 5 20D06 2 05C09 1 05C25 1 05E15 1 11B75 1 2-sequencing 1 20K01 1 Bailey's Conjecture 1 Primary 20D60 1 R-sequencing 1 Secondary 05B99 1 Weighted zero-sum 1 abelian groups 1 alternating groups 1 commuting graph 1 double-toroidal 1 element orders 1 finite group 1 genus 1 groups 1 locally maximal 1 maximal 1 planar graph 1 prime graph 1 product-free sets 1 projective special linear group 1 simple group 1 terrace 1 the number of elements with same order 1