sequences: move defs higher
sequences: move defs higher

mrjbq7/factor,mrjbq7/factor,factor/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,factor/factor,factor/factor,mrjbq7/factor,factor/factor,tgunr/factor,factor/factor,tgunr/factor