- seq-ref* seq indprocedure
references the value of a nested sequence at appropriate index list: with index '(0) it returns (seq-ref seq 0), with index '(1 0) it returns (seq-ref (seq-ref seq 1) 0)
references the value of a nested sequence at appropriate index list: with index '(0) it returns (seq-ref seq 0), with index '(1 0) it returns (seq-ref (seq-ref seq 1) 0)